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
