解方程组{2(x-y)/3 - x+y/4=-1 6(x+y)-41(x-y)=12
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解方程组{2(x-y)/3 - x+y/4=-1 6(x+y)-41(x-y)=12
![解方程组{2(x-y)/3 - x+y/4=-1 6(x+y)-41(x-y)=12](/uploads/image/z/17362162-10-2.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%E7%BB%84%7B2%28x-y%29%2F3+-+x%2By%2F4%3D-1+6%28x%2By%29-41%28x-y%29%3D12)
2(x-y)/3-x+y/4=-1……………………(1)
6(x+y)-41(x-y)=12……………………(2)
由(1):4x+5y=12……………………(3)
由(2):35x-47y=-12…………………(4)
由(3)得:x=(12-5y)/4…………………(5)
代(5)入(4),有:35(12-5y)/4-47y=-12
解得:y=156/121
代入(5),有:x=(12-5×156/121)/4
解得:x=168/121
6(x+y)-41(x-y)=12……………………(2)
由(1):4x+5y=12……………………(3)
由(2):35x-47y=-12…………………(4)
由(3)得:x=(12-5y)/4…………………(5)
代(5)入(4),有:35(12-5y)/4-47y=-12
解得:y=156/121
代入(5),有:x=(12-5×156/121)/4
解得:x=168/121
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