(x-22)+(x-24)+(x-27)+(x-20)=x怎么解
问题描述:
(x-22)+(x-24)+(x-27)+(x-20)=x怎么解
答
(x-22)+(x-24)+(x-27)+(x-20)=x
x-22+x-24+x-27+x-20=x
4x-93=x
4x-x=93
3x=93
x=31