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Algebra Level 1

\[\large \begin{align} \color{blue}{x} + \color{green}{y} &= 3 \\
\color{green}{y} + \color{red}{z} &= 5 \\ \color{red}{z} + \color{blue}{x} &= 4 \end{align}\]

Find \(\large \color{blue}{x} + \color{green}{y} + \color{red}{z}.\)

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