x+y=1 5x-2y=8 3x-y=7 2x-y=3
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x+y=1 5x-2y=8 3x-y=7 2x-y=3
x表示y和用y表示x
x表示y和用y表示x
![x+y=1 5x-2y=8 3x-y=7 2x-y=3](/uploads/image/z/18200285-53-5.jpg?t=x%2By%3D1+5x-2y%3D8+3x-y%3D7+2x-y%3D3)
x+y=1
y=-x+1
x=-y+1
5x-2y=8
y=(5x-8)/2
x=(2y+8)/5
3x-y=7
y=3x-7
x=(y+7)/3
2x-y=3
y=2x-3
x=(y+3)/2
y=-x+1
x=-y+1
5x-2y=8
y=(5x-8)/2
x=(2y+8)/5
3x-y=7
y=3x-7
x=(y+7)/3
2x-y=3
y=2x-3
x=(y+3)/2
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