{5x-3y+z=2,5x+2y-4z=3,-5x+y-z=2}解方程组 {x-y-z=-1,3x+5y+7z=11,4x-y+2z=-1}解方程组

问题描述:

{5x-3y+z=2,5x+2y-4z=3,-5x+y-z=2}解方程组 {x-y-z=-1,3x+5y+7z=11,4x-y+2z=-1}解方程组