1. Double the second equation and add it to the first.

     $\begin{array} {r} 4x + 2y = 76 \\ x - 2y = 10 \\ 10x = 17 \end{array}$

2. Solve for $x$.

3. Then substitute that answer back into one of the original equations.

4. Check your answer by substituting both answers for $x$ and $y$ into the other original equation.

5. A true statement means that your answers were correct.