若xy分之y减x等于3,求分x减2xy减y分之2x加3xy减2y

分类: 作业答案 • 2021-12-19 17:35:37

问题描述：

答

(y-x)/xy=3 -->1/x- 1/y=3-->y-x=3xy
（2x+3xy-2y)/(x-2xy-y)
=(x-y)/(-5xy)
=3/5
(y-x)/xy=3得x-y=-3xy (2x+3xy-2y)/(x-2xy-y)=3/5

答

题目写错了

答

(y-x)/xy=3 求（2x+3xy-2y)/(x-2xy-y) ?
(y-x)/xy=3 -->1/x- 1/y=3-->y-x=3xy
（2x+3xy-2y)/(x-2xy-y)
=(x-y)/(-5xy)
=3/5

答

(y-x)/xy=3得x-y=-3xy (2x+3xy-2y)/(x-2xy-y)=3/5