Question

3x+4y=-11/8

-4x-4z=0
-2y-z=3/8

Answer 1

-4x-4z=0 ---> z = -x

3 x + 4 y = -11/8
1 x - 2 y = 3/8

3 x + 4 y = -11/8
2 x - 4 y = 6/8
--------------------add
5 x = -5/8
x = -1/8
Now go back and get y and z