二元一次方程组,代入法和加减法求帮解请用代入法解决下面各方程组:1.y=2x-1 2.3x+2y=8 3.x+y=1 4.3x-2y=77x=3y+1 3x-y=3 3x+2y=5 3x-y=5请用加减法解下列方程组:1.3x-y=7 2.4x+3y=16 5x-2y=8 6x-5y=33请用适当方法
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![二元一次方程组,代入法和加减法求帮解请用代入法解决下面各方程组:1.y=2x-1 2.3x+2y=8 3.x+y=1 4.3x-2y=77x=3y+1 3x-y=3 3x+2y=5 3x-y=5请用加减法解下列方程组:1.3x-y=7 2.4x+3y=16 5x-2y=8 6x-5y=33请用适当方法](/uploads/image/z/2519588-20-8.jpg?t=%E4%BA%8C%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8B%E7%BB%84%2C%E4%BB%A3%E5%85%A5%E6%B3%95%E5%92%8C%E5%8A%A0%E5%87%8F%E6%B3%95%E6%B1%82%E5%B8%AE%E8%A7%A3%E8%AF%B7%E7%94%A8%E4%BB%A3%E5%85%A5%E6%B3%95%E8%A7%A3%E5%86%B3%E4%B8%8B%E9%9D%A2%E5%90%84%E6%96%B9%E7%A8%8B%E7%BB%84%EF%BC%9A1.y%3D2x-1+2.3x%2B2y%3D8+3.x%2By%3D1+4.3x-2y%3D77x%3D3y%2B1+3x-y%3D3+3x%2B2y%3D5+3x-y%3D5%E8%AF%B7%E7%94%A8%E5%8A%A0%E5%87%8F%E6%B3%95%E8%A7%A3%E4%B8%8B%E5%88%97%E6%96%B9%E7%A8%8B%E7%BB%84%EF%BC%9A1.3x-y%3D7+2.4x%2B3y%3D16+5x-2y%3D8+6x-5y%3D33%E8%AF%B7%E7%94%A8%E9%80%82%E5%BD%93%E6%96%B9%E6%B3%95)
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