5.求下列非齐次线性方程组的通解:-|||- ) (x)_(1)-5(x)_(2)+2(x)_(3)-3(x)_(4)=11 5(x)_(1)+3(x)_(2)+6(x)_(3)-(x)_(4)=-1 2(x)_(1)+4(x)_(2)+2(x) .