方程组 _(1)-3(x)_(2)+(x)_(3)=2 有不同的向量解， _(1)-3(x)_(2)+(x)_(3)=2 _(1)-3(x)_(2)+(x)_(3)=2则（）

解线性方程组_(1)-2(x)_(2)+(x)_(3)=-2-|||-__ __-|||-(x)_(1)+(x)_(2)-3(x)_(3)=1-|||--(x)

解方程组： ) (x)_(1)-(x)_(2)-(x)_(3)=2 2(x)_(1)-(x)_(2)-3(x)_(3)=1 3(x)_(1)+2(x)_(2)

1.用消元法解线性方程组.-|||- ) (x)_(1)+2(x)_(2)+(x)_(3)=3, -2(x)_(1)+(x)_(2)-(x)_(3)=-3 (

给定线性方程组 ) (x)_(1)+(x)_(2)+(x)_(3)=a-3 (x)_(1)+a(x)_(2)+(x)_(3)=-2 (x)_(1)+(x)_(

解下列线性方程组 ) (x)_(1)+2(x)_(2)+3(x)_(3)=1 2(x)_(1)+2(x)_(2)+5(x)_(3)=2 3(x)_(1)+5(

1.已知方程组 ) (x)_(1)+(x)_(2)+(x)_(3)+(x)_(4)=2 3(x)_(1)+2(x)_(2)+(x)_(3)+(x)_(4)=a

线性方程组 ) (x)_(1)+2(x)_(2)-2(x)_(3)=1 2(x)_(1)+4(x)_(2)-4(x)_(3)=2 3(x)_(1)+6(x)_

用克莱姆法则求解方程组 ) (x)_(1)-(x)_(2)-(x)_(3)=-1 -2(x)_(1)+2(x)_(2)+(x)_(3)=1 2(x)_(1)-

方程组 ) (x)_(1)+(x)_(2)+(x)_(3)=1 (x)_(1)+2(x)_(2)-(x)_(3)=2 (x)_(1)+k(x)_(2)+(x)

3.已知方程组 ) (x)_(1)+(x)_(2)+2(x)_(3)=a 3(x)_(1)-(x)_(2)-6(x)_(3)=a+2 (x)_(1)+4(x