3(2x-2)=12怎么算

问题描述:

3(2x-2)=12怎么算

3(2x-2)=12
2x-2=12/3
2x-2=4
2x=2+4
2x=6
x=6/2
x=332x-7x=420+5x 方程32x-7x=420+5x32x-7x-5x=42020x=420x=420/20x=21