3x+2y=5x+2,2(3x+2y)=11x+17
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3x+2y=5x+2,2(3x+2y)=11x+17
![3x+2y=5x+2,2(3x+2y)=11x+17](/uploads/image/z/8148403-19-3.jpg?t=3x%2B2y%3D5x%2B2%2C2%EF%BC%883x%2B2y%EF%BC%89%3D11x%2B17)
3x+2y=5x+2
2y=5x-3x+2
y=x+1
2(3x+2y)=11x+17
6x+4y=11x+17
4y=11x-6x+17
4y=5x+17
将y=x+1代入
4(x+1)=5x+17
4x+4=5x+17
4x-5x=17-4
x=-13
y=-13+1=-12
x=-13
y=-12
2y=5x-3x+2
y=x+1
2(3x+2y)=11x+17
6x+4y=11x+17
4y=11x-6x+17
4y=5x+17
将y=x+1代入
4(x+1)=5x+17
4x+4=5x+17
4x-5x=17-4
x=-13
y=-13+1=-12
x=-13
y=-12
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