求解简单的二元一次方程组x=3y-2和y=2x-y 2x=3y-12和4y=2x+1 3x-13y=-12和x+3y=2 2x-5y+13=0和9x+6y-8=0
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![求解简单的二元一次方程组x=3y-2和y=2x-y 2x=3y-12和4y=2x+1 3x-13y=-12和x+3y=2 2x-5y+13=0和9x+6y-8=0](/uploads/image/z/2603438-62-8.jpg?t=%E6%B1%82%E8%A7%A3%E7%AE%80%E5%8D%95%E7%9A%84%E4%BA%8C%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8B%E7%BB%84x%3D3y-2%E5%92%8Cy%3D2x-y+2x%3D3y-12%E5%92%8C4y%3D2x%2B1+3x-13y%3D-12%E5%92%8Cx%2B3y%3D2+2x-5y%2B13%3D0%E5%92%8C9x%2B6y-8%3D0)
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