I keep trying to solve this problem, but i keep on getting crazy answers, i think i am right up to a certain point and then doing something wrong, the question is to solvie this :
$ \begin{align*} 2x^2 + 3y + z &= 8\\ x - 2y &= 4\\ 3z - x &= 7 \end{align*} $
I've tried many things but can't work out what i'm doing wrong, any help will be appreciated.
Thanks in advance.