Question

can someone help me..
x+ y+ z= -2
2x+4y+2z= -12
-x+6y- 3z= -36

Answer 1

x=-2
y=-4
z=5

Answer 2

multiply the first equation by -2
add the new equation to the second equation getting
2y=-8
y=-4

Answer 3

add the first and third equation getting 7y-2z=-38
plug y in and get z
then plug in y and z into the first equation to get x