Answer:
z = 0
y = -3x/2 + 3
Explanation:
6x + 4y + z = 12
6x + 4y + 2z = 12
6x + 4y + 3z = 12
Second equation minus first equation:
z = 0
If you plug in z = 0 in all the original equations, you get a single equation:
3x + 2y = 6
The best you can do is to solve for y in terms of x.
y = -3x/2 + 3
Answer:
z = 0
y = -3x/2 + 3