2x-1/3=x+2/4-1
两边乘12
4(2x-1)=3(x+2)-12
8x-4=3x+6-12
5x=-10
x=-2
x-减x-2/5=2x-5/3减3
两边乘15
15x-3(x-2)=5(2x-5)-45
15x-3x+6=10x-25+45
2x=14
x=7