Simple algebra!

Algebra Level 1

\[ \begin{cases} \begin{array}{rcr} x + y &=& 15 \\ 3y - x &=& 5 \end{array} \end{cases} \]

If \(x\) and \(y\) satisfy the system of equations above, what is the value of \( x^2 + 2y + 1?\)

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