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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-,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.