2x-3(4x-9)=2+5(1-x)的结果是多少?
问题描述:
2x-3(4x-9)=2+5(1-x)的结果是多少?
答
2x-3(4x-9)=2+5(1-x)
2x-12x+27=2+5-5x
2x-12x+5x=2+5-27
-5x=-20
x=4