Question

System of equations, I think I've got it, but I'm not sure.

x + y + z = 6
2x + 5y + 2z = -27
-x + 9y - 3z = -48

This is what I've got so far....

I'm eliminating x first, so
x + y + z = 6
-x + 9y - 3z = -48

10y - 2z = -54
-2z = -54
z = 27

Answer 1

i personally think it would be easier with substitution

but that's basically the idea of it

not that you have the value for z

plug 27 in for everywhere you have z, and solve the system of equations for x and y like you just did for z

Answer 2

Thanks!