Solving a system in 3 variables problem?

Question

I need an answer for this problem, thanks in advance for the help.

Find $x$, $y$, and $z$ from the problem below.

\begin{eqnarray*} -2x + 1 &=& 5 \\ \\ 2x + 3y - 4z &=& 7 \\ \\ 3x + 2y + 2z &=& 3 \end{eqnarray*}

Answer 1

hint:

Since in the first equation you have $-2x=4$, then $x=-2.$ Plug in this $x$ value into the other two equations and you essentially have a system of $2$ equations and $2$ unknowns which simplifies the problem more. Hopefully you can take it from here.