4(2x-1)-2(x+1)=24
8x-4-2x-2=24
6x=24+4+2=30
x=30÷6
x=5
x÷2=（3x-10）÷5
两边乘10
5x=2(3x-10)
5x=6x-20
6x-5x=20
x=20