解一元一次方程专项练习题(200题-有答案).docx

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1、元一次方程专项练习200题(附答案)3Z(52)2+30.9=24.9,(53)5.3x2.9点5(62)XO.05=3.52811.5X+X=203.812+15X=87.6(78)4X=2,6(68)6X+5=17,(69)0.6(2.5+X)=4.2,(80)宜:78%=,9.(X4.52x=-9.(87)(70)32_丫一一八815(77)10_5_y22,27a18X45(82)3+卫x=46,(72)314InXis73)收会崇(74)(79)8(x2)=2(x+7),(98)4x+2(8x)=26,(88)3(x+4.5)=60,(89)1.6x+2.4=7.52,(100)-+

2、-=1,55(101)x(1+-)=3RIg(90)3(x0.8)=6.3,(702)S,(9/)28.45x=5.8,(92)x:1=A62R(93)l+2x=-l22(94)J-=15%,20(96)x+50%x=6,(703)(Iq)x=28,no),.R(722)x0.8x6=76,(777)637.8X=7.2,2)=i(123)1:&x:8,33(113)xE=42,14(724)015=x,0.。6(774)Ex+工=U,R52。(725)x:75=W:/,q6(775) 7x3=8.19,(116) 12:0.6=:工,2(117) 3(x+2)=4(x+1),139)2,(1

3、40)36(737)24,9.(729)2.5+7W=3W,767+3x=69,128)1(141)6x+2x56=0,8.53x=21,23x0.454=2.7(142)5.8x4.6x=0.96,(132)3至x=4,6(133) -5%=17.54,4(134) .1:2=1:(4273x)(143)8,4(9x)=3(144)3x7.2=8,(135)6+31=49(145)5x+28=71,(136)7x3=8.19,(137)32.89x=17.5(138)x-0.36=16-.(146)8.71.2x=3.9(765)1.9x=5.7(753)7.83x=3.6,(754)631

4、.8x=7.2,(755)10:x=4.5:0.8,(166)4.3y-y=4.6,(167)5x+2,6=7.6,(168)X-7.5=72.9,(156) :=x:(169) 9+5=8.4,4810(157) X7.65=464,(158) 28.25 X=8.25,(170) 6.8+3.2x=74.8,(159) X (3.6+2.97)=12.42,( 777 )5射喏,(187) 4x 3 (20 %+4=0,(189) 4x(178) - -x= A ,E m 13(190) 8x(788)平 a!56=12 ,3x=15.6,(191) 30 (x4) =60,(779)27

5、5%=3,3(180) 4x-y14=2.4,(181) W : x=2 : 4.5,95(192) 7.20.5 3x=1.2 .(793) 5x 2,45=8,(182) (x-45)6=12.5(183) 2717x=13.4,(784)9.6+3x=3.245,(785)2x+5=5x7,(795)5x2.415=66,(796)3.2x+2.8xx=1,3x=6.3,(200) x0.7+0.93=4,U-4,217-Lj21=21217X=/2;3 3)-4=-46受4x+4J+4x,4 6X(2-W)=1.2x=7.2,x=.2,555X=1;工4=4x+4,12(4) 82.5

6、2x=73.6202x=73.6,13.6+2X=20,2X=6.4,x=3.2;(5) 0.78:x=3:5,3x=0.785,3x=3.9,X=1.3(6) 120%x=0.4,120%x+20%x=0.4+20%X,0.4+20%X=7,0.4+20%X0.4=10.4,20%x=0.6,20%XX典=0.6X幽,29.0x=3;(10) 931.7x=13.4,271.7x=13.4,271.7x+1.7x=13.4+1.7x,734+7.7x=27,13.4+1.7x13.4=2713.4,1.7x13.6,77x7.7=73677,x=8(11) X25%x=24,乃%x=24,7

7、员x5%=24+75%,x=32;(72)-*+02=J,卫X-4卫X-43.0.6J,20.6+0.6=1+0.6,对卫X二皂,4m113,W4x=23)20% X 7.2+7.2=0.8+7.2 ,20% x20% =820%, x=40 ;X 2.43=0.8,X- 7.2=0.8,3) 0.6x+90第1.5x78,/.5xt5=78L5,x=52 ;(争-x=42 ,23x=12, 43x3=93 ,x=3.i.l=42l,6 6 x=2527.5,ll=4l ,333L 34(18) X2.25=8.25,X- 2.25+2.25=8.25+2.25,x=7O.5 ;V喏:x=3

8、: 72,5,W) =24, 色=24 ,(22) XX (2-XX(25)7,(26) X : 42=5:*42,(16)0.6x+32,5=67.5,0.67,567.5,O.6x+757.5=67.50.6x=600.6xO.6=6OO.6,x=1OO;(17)也(X-0.45)=53-(X-0.45)(x-0.45)=(X-53心45)X-2.4=1.6X-壬.4+2.4=1.6+2.4,3-1=4,3(20) x+0.=5.6,卫x+0.80.8=5.650.8,-x=4.8,63.=4.8-,63x=8(21) 1,4:X=1:075,x=1.40.75,X=1.056-=24-,

9、x=20;(23) 4卫二34,444+=3+,?,4444x=44x4=44,X=1(24) 12+70.3=20.1,12x+2.1=20.11A72x+2.72.1=20,12,12x12=1812,x=7.5;12+=9.*37-x610x=42-,71010=3010,x=35,27)UXo.5+0.75+l=3.75,20.75+40.75=3.75x=6;(28)0.8:工0.48:X,120.8x=-0.48,120.8x=0.2,0.8x0.8=0.20.8x4(29)X-2X=国,R533)2(X-3)=58,2(X3)2=5,82X-3=2.9,X-3+3=2.9+3,x

10、=5.9;(34)1.6x=6.4,1.6x1.6=6.41.6,x=4;(35)439=29,427=29,4x27+27=29+27,4x=56,4x4=564,X=74;(36)16+8x=4016+816=4016,8=248x8=248,x=3;(37)x1.13x1,11.1=31.1,x=3.34*,554二2一,5R5,Ex=3;(38)-l+2x=l,1.(30)42:1X至A57=42-,r30x=50;(37)5x0,4=75%,5x0.4+0.4=75%+0.4,5x5=7.755,x=0.23(32)6x60.9=4.5,0.9+0.9=45+0.9,6x=5.4,6

11、x6=5.46,=0.9;2x=-,42x2=l2,4-l(39)忠X3-12.762J67x1.127x=1.04,(40)X-7x=1.04,L04=1.041.04,7x=0,7x7=7.727、x=0.16;1L=2.31=2,X-1+1=2+1,囚x=316x=-;19(43)卫二26,79.42.4x=720.26,2.4x=18,72,24x2.4=78.722.4,x=7.8;1 25%X+25%J+25%x,40.25x+0.250.25=7-0.25,0.25x=0.75,x=3;1.25=X,0.25TTfi(49)0.25x=1.251.6,025x+025=7257.

12、6025,x=8;JXX=JLXJ,425(50)(44)1,2:2=,35x=7.253Z=6,3X=9;(45)1三=A:A111152=18,,_15IOX=JJ,x=图;6(57) 5:8=x:32,8x=532,8x8=5328,x=20(58) 2+30.9=24.92x+2.7=24.91、2x+2.72.7=24.92x2=22.22,kx=11.1;(59) 53x2.9X=W,X=12;2.4x2.4=W24,.6(46)工:I=X:0.8,2。5X=-Lx0.8,得=。.04,-iJX,OOX=O.2;(54)c(7-(7-2.8x)2.8x)=1.5D/42.4x=-5

13、3=3号Y-I-,32.7,7-2.8x=2.7,72.8x+2,x=2.1+2.8x,7-2.1=2.1+2.8x2,1,150%x+66=991.566=991.5x=33x=22(57)x+60.8x=16O.2x+6=760.2=10x=50x_x._(58)3T12x=12x=14.4(59)*5E0.55x=5.5x=10(60)3-(X心)=1.3m63-i(X至)X(x-卫)=1.3(x-3-l=l.3-0.78,13-W.78=1,3x0.78+0.78,14.68=1.3x4.687.3=7.3x7.3,x=3.6;(67)(X+0.5):21=(X4):124(x+0.5

14、)-,40.050.05X=O.17(X=52;(64)4x4.53X=6.38,183X=6.38,183X+3X=6.38+3X,6.38+3X=78,2.5+x 2.5=7 2.5,x=4.5 ;6.38+3X6.38=186.38,3X11.62,3X3=11.623,X=581.7r11,(65) 4X7.2=10,4X7.2+7.2=70+7.2,4X=17.2,4X+4=77.24,X=4.3;(66) 77.5X+X=2O,12.5X=20,72.5X72.5=2O72.5,X=1.6;(67) 3,812+15X=87.6,45.6+15X=87.6,45.6+15X45.6

15、=87.645.6,15X=42,75X+75=4275,X=2.8(68) 6X+5=17,6x+5-5=175,6x6=726,x=2;(69) 0.6(2.5+X)=4.2,0.6(2.5+X)0.6=4.20.6,2.5+x=7,0.6-_Lx22,IOu27xR1WX型乂出,27X1p110x一;一(72)l-AJJIOx15X=111.1升y1f同XX有,(73)To-M=X-3163.45,x.4x-,551452X巧(74) 4(W+x)=竺,65-L+4x=-,55l+4x-理=竺-l,554x=4,X=1;(75) WXO.25+4=乜,R240.2+X=-240.2+-I

16、x-0.2=&9.40.2,1.U./220(77)200:6=x:12,56x=2OO12,56x6=4806x=80(78)4X=2,K4+XxX=2X,2ENX=4,5Z2=42,E6X=IO;(79)8(X2)=2(x+7),8X6X16=2X+14,16=14,6X=30,X=5;(SO)4A:18%=,巩X=0.18x6.5,驾e20X=7.84.5(87)2x=-2旦-2x+2i+2x2.l+2x-if25,5(82)2立,N12x2=-l2,,1X=C;9.(&+3x=46,韶46,18x3=64,18x3+3=64+318x=6778x78=6778,y_67(87)8(2X

17、7)=5(X+716x56=5x+65316x565x=5x+6511x56=65,11x56+56=65+56,IlX=I21,11x11=12U11,第嘲=46嘴x=40;(83):x=2:国,435x=77,(88)3(x+4.5)=60,3(x+4.5)3=603,x+4.5=20,x+4.54.5=2045,X=75.5f=-2,2=-2,3313X=(89)1.6x+2.4=7.52,1.6x+2.42.4=7.522.4,1.6x=5.12,7.6x7.6=5.727.6,x=3.2;(84)I=id,Y1.6=6.42,1.6x=12.8,7.6x7.6=72.87.6,x=8

18、(90)3(X-。8)=6.3;3x2.4=63,3x,2.4+2.4=6.3+2.4,3x=8.7,3x3=8.73,x=2.9;(85)5(3x4)-2(x-7)=5(2xD15x202x+2=10x5,13x18=10x5,131810=10x510x,3x18=5,3x18+18=-5+78,3x=13,3x3=133,(91)28.45x=5.8,28.45x+5x=5.8+5x5.8+5x=28.4,5.8+5x5,8=28,45.8,5x=22.6,5x5=22.65,x=4.52(92)X:1=第2Q页共34页52x=1;F2x=0;(94)-L=15%,23xx=15%x,2

19、0J5x=0J5,0.15xW.15=0.150.15,x=1;(Iol)(L2)=22,IlL22;1Q1R1Q111YX15_22x15,x=-,1516JLx.7J7,151615,IE(皿0-3心l-3x+3x=+3或I1Il,9.214233=a+3,44(105) X 吗二(96) x+50%=6,1.5x=6,7.5x7.5=675,x=4;(97) 三:=O,3:12,40.3X=WXI2,40.3x0.3=90.3,x=30;(98) 4x+2(8x)=26,4x+162=26,2x+76=26,2x+1616=2616,2x2=1O2,x=57x=2855x28,x=20;

20、(104)X21,,1.:7xi1441l7.(99) &0, V 3. 3_n. 3 .7x=k/5x=6155x+35 35=650X 35,x=123 ;(107) 7203x=80,72033=803x,x=3 ;240x=720,240x240=720240,=3;(708)3.60.9x=8J,(3.60.9)x=8.1,2.78.1,2.7x2.7=8.72.7,(109)44.53=6,183x=6,183+3=6+3,6+3x=18,6+36=186,3x=12,3x3=72+3,x=4(110)里”,.R2.5x=100.8,2.5x2.5=82.5,x=3.2;(111)

21、63-1.8X=7.2,181.8X=7.2,181.8X+1.8X=7.2+1.8X,7.2+L8X=18,7.2+1.8X7,2=187.2,1.8X=10.8,1.8X1,8=10.81.8,X=6x=423x+6=4x+4 3+6 3x=4x+4 3x ,+4=6 ,x+4 4=6 4x=2x=4R X=65(118)3x70%x=9.2,3x0.7x=9.22.3x=9.2,2.3x2.3=9.22.3,(119)6+x=240,6+62406,(775)7x3=8.79,7x33=8.193,7x=24.577724577x=390 2M2.5 0.4x=12.5 22.5 0.4

22、x+0.4x=72.5+0.4x12.5W.4x=22,5, J50.4x 72.5=22.512.5,0.40.4=100.4,x=25 ;(727)x:3.5=4:21,32-x=3.54,32J21=7421,333x=6(122)x0.8x6=16,0.2x6=76,O.2x6+6=16+6,02x0.2=2202,x=11O;(723)1:&:8,332=8A-xS-l-5,3232X=4;(724)015=X,S06一20.06x=20.015,0.06x0.06=0.03+0.06x=O.5;(125)X:75=旦:1,96工X=75XW,6gx6=15-669=40;17241

23、1YXIlXl2,(128)1务二包,12+且X=卫+3耳4E4&+务=7,543+3y3.3,H45324,43F3(729) 2.5+1x=3,372.5+1x-2.5=3旦-2.5,37(730) 3$22=43x-2-l21=4+2A6243鸟=61,.623至X+3昱61+3工6626X-39-23(737)8.53x3,28.53x+3x=2-+3xL2-3x+21=8.5,23x+212-1=8.522%、3x=6,3x3=63,2324(733)-5%=17.544解:务-5%+5%4=17.54+5%,X),解:4 TX= 44J=7.59,4422=2+J_2_,21212

24、2140.1ly.1,2122x=317(135)6+31=49五6x+3731=4937,6x=18,6x6=786,x=3;(136)7x3=8.19,7x33=8.193,7x=24.57,7x+7=24.57+7,x=3.51;(137)32.89x=17.5,32,89x+9x=17.5+9x,17.5+9x=32.8,9x=75.3,9x9=5.39,17.5+917.5=32.877.5,0,640.64=160.64,xAX诙,42+3x=69,42+3x42=6942,3x=27,3x3=273,x=9;(140)6x+2X56=0,(6+2)X56+56=0+56,8=56

25、,8x8=568x=7(141) 3x0.454=2.7,3x1,8=2.7,31.8+1.8=2.7+1.83x=4.53x3=4.53,x=1.5;(142) 5.84.6x=0.96,1.2=0.96,7.2x7.2=O.967.2,x=0.8:(143) 8.4(144) x)=39x=8,439X28;(144)3x72=8,,3x1.21,2=81,2,3x=9.6,3x3=9.63,x=3.2(145) 5x+28=77,5x+2828=7128弋T5x=43,.曰5x5=435,一x=8.6;yr(146) 8.71.2x=3.9、8.71.2+1,2x3,9=3.9+1.23

26、.9,4.8=1.2x1.2x4.8,7.2x7.2=4.87.2,x=4;(147) 82.6x=37.8,5.4x=37.8,JBB*4.一MXX=76.4,;(749)542+3x=72,27+3x=72,27+3x27=7227,3x=45,3x3=453,x=15;(150)8x2.637.8,82.6+2.6=37.8+2.6,8=40.48x8=40.48,x=5.05(757)L昱2,4一电151/1/4=-4,4121x=v4(752)x+30%x=26,(7+30%)x=26,1.3x=26,7.3x7.3=2673,x=20;(753)7.83x=3,6,7.83x+3x

27、3.6+3x,3.6+3x=7.8,3.6+3x3,6=7.83.63x=4.2,3x3=4.23,X=1.4(154)631.8=7.2,181.8=7.2,4.-16.910.81.(155y10:x=4.5:0.8,4.5x=100.8,.5=84,5(156)1:l=x:A10lx=lA-,1.8t-X=,4IOxlx:A1=IX4X=(157) X7.65=4.64,X7.65+8.67=464+7.65,X=12.29;(158) 28.25X=8.25,28.25X+X=8.25+X,X+8.25=28.25,X+8.25825=28.258.25,X=2O;(159) X(3.

28、6-2.97)=12.42,X6.57=12.42X6.57+6.57=72.42+6.57,X=18.99(760)x=卫,3R80% x=48, ).8) x=48,,0.2=48, x0.2=480.2=240 ;(163 ) 75% x- 5x2=6,0.75X3=6,0.753+3=6+3,0.75x=9,0.75x0.75=90.75,x=12(164)x6.8=15.4,x-6.8+6.8=15.4+6.8,x=22.2;(765)1.9x=5,779x7.9=5.77.9,x=3:(766)4.3yy-4.63.3y=4.6,33y33=4633,4633(767)5x+2.6

29、=7.6,5x+2.62.6=7.62,6,5x=5,5x5=55,x=1(168)-7.5=72.9,X1.5+1.5=12.9-7.5,x11.4;(169)9x+5x=8.4,14x=8.4,74x74=8.474,6.8,3.2x=8,x=O.6;(170)6.8+3.2=14.8,6.86.8+3.2x=14.821(175)X40%x=9,0.6x=9,O.6xO.6=9O.6,x=15;-U=J1,6666X=7.;(173)4.51-31x=7.5,39.1.53.5x=1.51.5-3.5x+3.5x=7.5+3.5X,1.5=1.5+3.5x1.51.5=1.5+3.5x1

30、.5,0=3.5x,03.5=3.5x3.5,x=O(774)(7+25%)x=0.5,7.25x=Q5,1.25x1.25=0.5.25,=0.4;(176)x20%=15.2,x20%20%=75.22O%,x=763Ox30+30=780+30,30x=210,30x30=21030,x=7;(177)30x30=180;(7795争75%=3,x=2.275%75%4=375%,O(180)4x-14=2.44x6=2.4,4x=2.4+6,x=8,44,x=2.1(787)W:x=2:4.5,95x=4.5-,59=2,5x=2-,2x=5(785)2x+5=5x72x+52x=5x

31、72x,3x7=5,3x7+7=5+7,_Y3x=12,3x+3=723,=4;(186)3(x-2)=25(x-2),3x6=125x,36+5x=125x+5x,86=12,8x6+6=12+6,8x=18,8x8=188,x=2.25;(787)4x3(20x)+4=0,756=0,756+56=0+56,7x=56,7x7=567;vx=8:(782)(X4.5)6=12.5,6x4,56=12.5,6x27=12.5,627+27=72.5+27,6x=39.5,66=39.56,(788、年空37,)乂24=124,x=6;12(183)2717x=13.4,2717+17x=13.4+17x,13.4+17x=27,13.4+17x13.4=2713.4,6(y+2)4W3)=24,3。2y=24,302y+2y=*24+2y,2y+24=30,2y+2424=3024,,hs9)4x-2y=62y2=6,y=356=12,17x13.6,17x17=13.617*430=12,4x30+3O=72+30,4x=42,

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