If you were to use the substitution method to solve the following system, choose the new system of equations that would result if z was isolated in the first equation.

2x - 5y + z = 15
4x - y + 3z = 15
3x - 2y + 2z = 13

Question

If you were to use the substitution method to solve the following system, choose the new system of equations that would result if z was isolated in the first equation.

2x - 5y + z = 15
4x - y + 3z = 15
3x - 2y + 2z = 13

anonymous · Answer

I would set first equation in terms of z

anonymous · Answer

So, just turn it into z = blahblah, and then substitute in what Z equals out to?

anonymous · Answer

z=5y-2x+15
plug in that whereever you see z

anonymous · Answer

Thought so. Thanks!

hero · Answer

peyton, I posted a solution