(3x-15)/(5x+15)=1/2过程解
问题描述:
(3x-15)/(5x+15)=1/2过程解
答
(3x-15)/(5x+15)=1/2
2(3x-15)=5x+15
6x-30=5x+15
6x-5x=15+30
x=45