啊..若︱x-y+3︱与︱x+y-1999︱互为相反数,求(x+2y)/(x-y)的值
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![啊..若︱x-y+3︱与︱x+y-1999︱互为相反数,求(x+2y)/(x-y)的值](/uploads/image/z/2780353-1-3.jpg?t=%E5%95%8A..%E8%8B%A5%EF%B8%B1x-y%2B3%EF%B8%B1%E4%B8%8E%EF%B8%B1x%2By-1999%EF%B8%B1%E4%BA%92%E4%B8%BA%E7%9B%B8%E5%8F%8D%E6%95%B0%2C%E6%B1%82%EF%BC%88x%2B2y%EF%BC%89%2F%EF%BC%88x-y%EF%BC%89%E7%9A%84%E5%80%BC)
啊..若︱x-y+3︱与︱x+y-1999︱互为相反数,求(x+2y)/(x-y)的值
啊..若︱x-y+3︱与︱x+y-1999︱互为相反数,求(x+2y)/(x-y)的值
啊..若︱x-y+3︱与︱x+y-1999︱互为相反数,求(x+2y)/(x-y)的值
x-y=-3,x+y=1999.
啊..若︱x-y+3︱与︱x+y-1999︱互为相反数,求(x+2y)/(x-y)的值
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