1.解方程组 2x+6y=3① 3x+15y+2z=5② 4x-9y+4z=7③ 2.求方程组5x+3y=-16①6x-2y=-36②4x-5y=-35③1.解方程组 2x+6y=3① 3x+15y+2z=5② 4x-9y+4z=7③ 2.求方程组5x+3y=-16①6x-2y=-36②4x-5y=-35
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![1.解方程组 2x+6y=3① 3x+15y+2z=5② 4x-9y+4z=7③ 2.求方程组5x+3y=-16①6x-2y=-36②4x-5y=-35③1.解方程组 2x+6y=3① 3x+15y+2z=5② 4x-9y+4z=7③ 2.求方程组5x+3y=-16①6x-2y=-36②4x-5y=-35](/uploads/image/z/325831-31-1.jpg?t=1.%E8%A7%A3%E6%96%B9%E7%A8%8B%E7%BB%84+2x%2B6y%3D3%E2%91%A0+3x%2B15y%2B2z%3D5%E2%91%A1+4x-9y%2B4z%3D7%E2%91%A2+2.%E6%B1%82%E6%96%B9%E7%A8%8B%E7%BB%845x%2B3y%3D-16%E2%91%A06x-2y%3D-36%E2%91%A14x-5y%3D-35%E2%91%A21.%E8%A7%A3%E6%96%B9%E7%A8%8B%E7%BB%84+2x%2B6y%3D3%E2%91%A0+3x%2B15y%2B2z%3D5%E2%91%A1+4x-9y%2B4z%3D7%E2%91%A2+2.%E6%B1%82%E6%96%B9%E7%A8%8B%E7%BB%845x%2B3y%3D-16%E2%91%A06x-2y%3D-36%E2%91%A14x-5y%3D-35)
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