Question

Solve this system of equations.

x-z=5
y+3z=12
2x+y=7

Answer 1

2x-2z-2x-y=5-7
-2z-y=-2
-2z-y+y+3z=12-2
z=10
x=5+z=15
y=12-3z=12-30=-18

Answer 2

Thanks!

Answer 3

I think you need to check the calculations and solutions....as they don't work for the last equation

2x + y = 7 of x = 15 and y = -18 30-18 = 12.... and not 7