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1、解比例练习题（一）11x:10= ： 一4 30.4:x=1.2:212 _32.4 x0.8:4=x:833 :x=3:1241.25:0.25=x:1.62=89 x36 =54x 3x:2=6: 3244.5 ,二 625x2.245:x=18:26一 :x=-2.8:4.2=x:9.6142.8:4.2=x:9.6108解比例练习题（二）4.6 802=xx:24=8:x=-：-=x:1120. 6 : 4=2.4 : x0.6 1.572 =x-3：1 = x：48上空一x= 07：4 2512 5 3614210 : 50= x : 401.3 : x = 5.2 : 20 x:3
2、.6=6 ： 181116一:二: x3 20 93 x一 二8 64解方程（一）X 2 X=3 742X +70%X + 20%X = 3.6X - 15%X = 68XX 3=20X 125% + 10X =543X+ 3X= 1215X5 3x2 =5212X+ - =128217343、，1336X+ 5 =13.4X -二3X=4488X+ 2 二7-一X4X2-6X-=2716843解方程（二）123+ X=103 X =丝572CX=x竺9651X+6 _ 26 v 13-35 4525x 3 X9 = 29-x + -x = 4-X- 21 X 2=4101x x = 2042
3、(x -2.6) -86X+ 5 =13.42135 X-3 X=1oX -6= 385X=旦X=42115二 4_15 =5 28解方程（三）212X+ - = 12343X二 5728X小96X”51替 626 3X 一35 4513251X-0.25=14X4=30%4+0.7X=10221-X+- X=4232X+14X=105X- 3X=4008X-0.125X=8361 1X-3 -43 X+7 X=18X13x( 6+ 8尸1312x一0.375x=56解方程（五）xx 2 + 1=4X 3X 3X= 123 2875 X 2.4 X5 = 80.36X5- 3 x =423(x
4、- 4.5) = 7312 x- 25%x = 10x- 0.8x = 16+620 x8.5= 1.5x-4x -4= 21 5c,3823x+ 25%x=90X-7X= 9 X - 7 X=123312X + 5 = 570%X + 20%X = 3.6 Xx*:25% + 10X =55X-3X 5 =214557X - 15%X = 68X6X3+ -X= 1218+ 5 =13.423X+ 14=12313X4483X=38X+ 2=Z7 16X+ 7 X=3844X2一 6 X 3=212 -5 -3X=103 X =空 572?X : 9=-X61651X35 451325解方程
5、（六）4x 3 X9 = 291x+ 1x = 4 2632qX 21X -=41031”x x = 2042(x-2.6)=86X +5 =13.42135 X-3 X=w4X6 : 385X=1519旦X=4X-4.-152115528212X+ 1=12343X=255729651626 . 13-一35 4525解方程（七）351X-0.25=-4X=30%4+0.7X=10242 X+1 X=4232X-0.125X=8X+11 X=1054X-33 X=400836 _ 3X4X+37 X=181312x 0.375x=-6xx -+1=4X a3 2813xx（ 6 + 8 ）X
6、- 3X= 1272.4 X5 = 80.36解方程（八）2a (x- 4.5) = 73x- 25%x = 10+ 25%X=90x- 0.8x = 16+620 x8.5= 1.5x-4x -4= 21 538x 7 X= 9237 X=42X70%X + 20%X = 3.631XX -=20X 125% + 10X =X - 15%X = 683X+ 3X= 12185X5-3X-55721解方程（九）34-13X -二一483X-38X2 _ 7 -7 16X+ 7X- 844X-6X 2-231253 十X-103 X -空 5728 X -91x” 651X6 -26 乂35 4
7、513254 x 3X9-291x + -x 263 X 21 X 2 =41031x x = 2042(x -2.6) =84解方程（十）2136X+ 5 =13.45 X- 3 X=104X -6 = 385X=15-8x=1XJ _15一1921155 282X+ 1 = 123X=258y_1 % 16X人3457296513626 _X 13X-0.25=1-=30%35 4525444+0.7X=1022X+1 X=42X+11 X=105324解方程（十一）3X-3X=400X-0.125X=8831313X+7 X=18X x( 6 +)=8)12x-0.375x=-6XX 2 + -=4X 3X - -X= 123 2875 X-2.4 X5 = 80.36X5- 3 x =42.(x- 4.5) = 7312 x- 25%x = 10x- 0.8x = 16+620 x 8.5= 1.5
