(1/36)X+(1/45)X+1/2=(1/20)X+(1/75)X

问题描述:

(1/36)X+(1/45)X+1/2=(1/20)X+(1/75)X
计算,写出重点的过程

(1/36)X+(1/45)X+1/2=(1/20)X+(1/75)X
5/180X+4/180X+1/2=9/180X+1/75X
9/180X+1/2=9/180X+1/75X
1/75X=1/2
X=75/2