# Thirteen and variables

If $$13 \space | \space 2x + 3y$$, is it true that $$13 \space | \space 3x - 2y$$?

Details: $$(x,y)$$ are all real numbers.

Notation: $$a \space | \space b$$ means $$a$$ divides $$b$$, or $$b$$ is divisible by $$a$$.

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