Question

Solve the system of linear equations.
a.x_(1)+x_(2)+2x_(3)=8 -x_(1)-2x_(2)+3x_(3)=1
b.3x_(1)-7x_(2)+4x_(3)=10x_(1)+x_(2)+4x_(3)=5
c.2x_(1)+x_(2)-x_(3)=92x_(1)-3x_(2)=-2
2x_(1"