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Completion requirements
Solve the following system of equations by elimination. Verify the solution.
\(\left\{ \begin{array}{l}
2y = x + 3 \\
4y = x^2 + 6x - 15 \end{array} \right.\)
\(\left\{ \begin{array}{l}
2y = x + 3 \\
4y = x^2 + 6x - 15 \end{array} \right.\)