(3/4y+40)/(y-40)=5/4怎么解,怎么解,一步一步写清楚

问题描述:

(3/4y+40)/(y-40)=5/4怎么解,
怎么解,一步一步写清楚

(3/4y+40)/(y-40)=5/4
3/4y+40=5/4(y-40)
3/4y+40=5/4y-50
3/4y-5/4y=-50-40
-1/2y=-90
y=180

不明白可追问,答题不易望采纳,祝学习进步!

交叉乘得
5y-200=3y+160
2y=360
y=180