(x-22)+(x-24)+(x-27)+(x-20)=x

题目

(x-22)+(x-24)+(x-27)+(x-20)=x
解方程 要写清楚

答案

(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