#### Answer

$y=-6$

#### Work Step by Step

$12=y-3y$ $\longrightarrow$combine like terms
$12=-2y$ $\longrightarrow$multiplication property
$12\div-2=-2y\div-2$ $\longrightarrow$divide
$-6=y$

Published by
Pearson

ISBN 10:
0321955048

ISBN 13:
978-0-32195-504-3

$y=-6$

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