{3x-2y=2① 5x+4y=1② {3(x-1)=4(y-6)① 5(y-3)=3(x+5)②{x+y/2 减 x-y/3=6① 4(x+y)-5(x-y)=2② (用加减消元法解方程,急列~)
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![{3x-2y=2① 5x+4y=1② {3(x-1)=4(y-6)① 5(y-3)=3(x+5)②{x+y/2 减 x-y/3=6① 4(x+y)-5(x-y)=2② (用加减消元法解方程,急列~)](/uploads/image/z/401967-63-7.jpg?t=%EF%BD%9B3x-2y%3D2%E2%91%A0+5x%2B4y%3D1%E2%91%A1+%EF%BD%9B3%EF%BC%88x-1%EF%BC%89%3D4%EF%BC%88y-6%EF%BC%89%E2%91%A0+5%EF%BC%88y-3%EF%BC%89%3D3%EF%BC%88x%2B5%EF%BC%89%E2%91%A1%EF%BD%9Bx%2By%2F2+%E5%87%8F+x-y%2F3%3D6%E2%91%A0+4%EF%BC%88x%2By%EF%BC%89-5%EF%BC%88x-y%EF%BC%89%3D2%E2%91%A1+%EF%BC%88%E7%94%A8%E5%8A%A0%E5%87%8F%E6%B6%88%E5%85%83%E6%B3%95%E8%A7%A3%E6%96%B9%E7%A8%8B%2C%E6%80%A5%E5%88%97%7E%EF%BC%89)
{3x-2y=2① 5x+4y=1② {3(x-1)=4(y-6)① 5(y-3)=3(x+5)②{x+y/2 减 x-y/3=6① 4(x+y)-5(x-y)=2② (用加减消元法解方程,急列~)
{3x-2y=2① 5x+4y=1② {3(x-1)=4(y-6)① 5(y-3)=3(x+5)②
{x+y/2 减 x-y/3=6① 4(x+y)-5(x-y)=2② (用加减消元法解方程,急列~)
{3x-2y=2① 5x+4y=1② {3(x-1)=4(y-6)① 5(y-3)=3(x+5)②{x+y/2 减 x-y/3=6① 4(x+y)-5(x-y)=2② (用加减消元法解方程,急列~)
(1)①X2+②得:11x=5,x=5/11,y=-7/22
(2)化简得:3x-4y=-21①-3x+5y=30
①+②得:y=9,x=5
(3)化简得:5y/6=6①-x+9y=2②,y=36/5,x=-314/5