解线性方程组: (x)_(1)+(x)_(2)-5(x)_(3)+(x)_(4)=8 (x)_(1)+(x)_(2)-5(x)_(3)+(x)_(4)=8 (x)_(1)+(x)_(2)-5(x)_(3)+(x)_(4)=8 (x)_(1)+(x)_(2)-5(x)_(3)+(x)_(4)=8

解线性方程组:



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