Answer
$-x + 2y = 6$
Work Step by Step
$ y = \frac{1}{2}*x + 3$
$2*(y) = 2*(\frac{1}{2}*x + 3)$
$2y = x + 6$
$2y (-x) = x (-x) +6$
$-x + 2y = 6$
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