若xy分之y减x等于3,求分x减2xy减y分之2x加3xy减2y

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若xy分之y减x等于3,求分x减2xy减y分之2x加3xy减2y若xy分之y减x等于3,求分x减2xy减y分之2x加3xy减2y若xy分之y减x等于3,求分x减2xy减y分之2x加3xy减2y(y-x

若xy分之y减x等于3,求分x减2xy减y分之2x加3xy减2y
若xy分之y减x等于3,求分x减2xy减y分之2x加3xy减2y

若xy分之y减x等于3,求分x减2xy减y分之2x加3xy减2y
(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

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

题目写错了

(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