Answer
$a=4$
Work Step by Step
$-a/4= -3*(a-2)/6$
$-a*1.5/4*1.5=-3*(a-2)/6$
$-1.5a/6=-3*(a-2)/6$
$-1.5a=-3*(a-2)$
$2*(-1.5a=-3*(a-2))$
$-3a=-6*(a-2)$
$-3a=-6a+12$
$3a=12$
$3a/3=12/3$
$a=4$
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