help!
I tried using the substitution method, it's not making sense. The problem says:
What is the solution of the system of equations?

3x + 2y + z = 7
5x + 5y + 4z = 3
3x + 2y + 3z =1

Question

help! 
I tried using the substitution method, it's not making sense. The problem says: 
What is the solution of the system of equations?

3x + 2y + z = 7
5x + 5y + 4z = 3
3x + 2y + 3z =1

anonymous · Answer

Ew. Just ew.

Well, I would start with solving two parts.

If you take 3x+2y+z=7
And subtract from that 3x+2y+3z=1
You get -2z=6

Now that you know z, can you find the rest?

anonymous · Answer

I figured out z by doing just what you did, but then I got confused from there cuz it wasnt making sense

anonymous · Answer

Well, you then get:

3x+2y=10
5x+5y=15 (I cleaned up the z's already)

Solving for x in the first you can get x=(10-2y)/3

Put that into the second equation and find y. And go back and get x.

anonymous · Answer

oh ok. Thanks for your help!