Question

X+y+z=6 x-y+2z=5 x-y-3z=-10

Answer 1

x+y+z=6 x-y+2z=5 x-y-3z=-10

x+z=6-y x+2z= 5+y x-3z=-10+

x=6-z-y x=5+y-2z x=-10+y+3