若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值
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若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值
![若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值](/uploads/image/z/15134769-9-9.jpg?t=%E8%8B%A5x-y%E5%88%86%E4%B9%8Bx%2By%3D3%2C%E6%B1%82%E5%BC%8F%E5%AD%90x%2By%E5%88%86%E4%B9%8B5%28x-y%29%E2%80%942%EF%BC%88x-y%EF%BC%89%E5%88%86%E4%B9%8Bx%2By%E7%9A%84%E5%80%BC)
(x-y)分之(x+y)=3
(x+y)分之5(x-y)—2(x-y)分之(x+y)
=5*(x+y)分之(x-y) -2*3
=5/(x-y)分之(x+y)-6
= 5/3 -6
= -13/3
(x+y)分之5(x-y)—2(x-y)分之(x+y)
=5*(x+y)分之(x-y) -2*3
=5/(x-y)分之(x+y)-6
= 5/3 -6
= -13/3
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