Answer
$y=4$
Work Step by Step
$3y-12=0$ $\longrightarrow$addition property
$3y-12+12=0+12$ $\longrightarrow$simplify
$3y=12$ $\longrightarrow$multiplication property
$3y\div3=12\div3$ $\longrightarrow$simplify
$y=4$
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