If $$x, y,$$ and $$z$$ are integers, is $$x + y + 2z$$ even?

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If $$x, y,$$ and $$z$$ are integers, is $$x + y + 2z$$ even?

by VJesus12 » Tue Aug 17, 2021 7:45 am

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If $$x, y,$$ and $$z$$ are integers, is $$x + y + 2z$$ even?

(1) $$x + z$$ is even.

(2) $$y + z$$ is even.