The system of equations is
.
Multiply equation (2) by 2.
\
equation (3) \ \
Add (3) and (1) equations.
\ 
Divide each side by 3. \ \
\


Apply square roots on each side and eliminate the square.
\

Now solve for y, and substitute
in
.


Subtract 17 from each side.
\

Multiply each side by negative one.
\

Apply square roots on each side and eliminate the square.
\

The solutions of them system are
.