Question

X+y-z= -2
2x-y-z= -7
4x+y+22= 4​

Answer 1

Step-by-step explanation:

x = -2 -y + z

than

2 ( -2 -y +z) - y -z = -7

-4 -3y + z = -7

z = -3 + 3y

so

find Y by solving in 1st equation

I'm bit lazy sorry