1.(2x-7)/3=(3-2x)/5
两边同乘以15得
5(2x-7)=3(3-2x)
即10x-35=9-6x
16x=-26
x=-13/8
2.(x-1)/4=(2x-1)/6
丙边同X12得
3(x-1)=2(2x-1)
即3x-3=4x-2
x=-1
3.x-(x-1)/2=2-(x-3)/5
两边同乘以10得
10x-5(x-1)=10-2(x-3)
7x=11
x=11/7
4.x/0.3-(x+2)/(1-0.5)=1.2
同乘以3得
10x-2(x+2)=3.6
8x=3.6+4
x=0.95