在方程组:x+y=m,2x-y=6中,若x大于0,y小于0,求m的取值范围,若xy小于0且x,y都为整数,求m的值
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![在方程组:x+y=m,2x-y=6中,若x大于0,y小于0,求m的取值范围,若xy小于0且x,y都为整数,求m的值](/uploads/image/z/567864-0-4.jpg?t=%E5%9C%A8%E6%96%B9%E7%A8%8B%E7%BB%84%EF%BC%9Ax%2By%3Dm%2C2x-y%3D6%E4%B8%AD%2C%E8%8B%A5x%E5%A4%A7%E4%BA%8E0%2Cy%E5%B0%8F%E4%BA%8E0%2C%E6%B1%82m%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%2C%E8%8B%A5xy%E5%B0%8F%E4%BA%8E0%E4%B8%94x%2Cy%E9%83%BD%E4%B8%BA%E6%95%B4%E6%95%B0%2C%E6%B1%82m%E7%9A%84%E5%80%BC)
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