(3x+2)/4-(5x+1)/2=2-(7x-1)/3
两边乘以12
3(3x+2)-6(5x+1)=24-4(7x-1)
9x+6-30x-6=24-28x+4
9x-30x+28x=24+4-6+6
7x=28
x=28/7
x=4