6(x-2)-7(x-1)=3(1-x)等于多少?
问题描述:
6(x-2)-7(x-1)=3(1-x)等于多少?
答
6(x-2)-7(x-1)=3(1-x)
6x-12-7x+7=3-3x
6x-7x+3x=3+12-7
2x=8
x=4