-7-9x=2x*-7 求X值2.((x+y)/4)-((x-y)/3)=1 ((x+y)/4)+((x-y)/2)=93.(3/(x+1))-(4/(y-2))=2 (1/(x+1))+(y/(y+2))=5第二第三题求XY两值
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![-7-9x=2x*-7 求X值2.((x+y)/4)-((x-y)/3)=1 ((x+y)/4)+((x-y)/2)=93.(3/(x+1))-(4/(y-2))=2 (1/(x+1))+(y/(y+2))=5第二第三题求XY两值](/uploads/image/z/15225692-68-2.jpg?t=-7-9x%3D2x%2A-7+%E6%B1%82X%E5%80%BC2.%28%28x%2By%29%2F4%29-%28%28x-y%29%2F3%29%3D1+%28%28x%2By%29%2F4%29%2B%28%28x-y%29%2F2%29%3D93.%283%2F%28x%2B1%29%29-%284%2F%28y-2%29%29%3D2+%281%2F%28x%2B1%29%29%2B%28y%2F%28y%2B2%29%29%3D5%E7%AC%AC%E4%BA%8C%E7%AC%AC%E4%B8%89%E9%A2%98%E6%B1%82XY%E4%B8%A4%E5%80%BC)
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