120x:2700-100x=3:2,
问题描述:
120x:2700-100x=3:2,
两位都够速度吖!小女感激不尽~
答
120x:2700-100x=3:2
2×120x=3(2700-100x)
240x+300x=8100
x=8100/540
x=15