Answer
$y=-5$
Work Step by Step
$12y-10=-70$ $\longrightarrow$addition property
$12y-10+10=-70+10$ $\longrightarrow$combine like terms
$12y=-60$ $\longrightarrow$multiplication property
$12y\div12=-60\div12$ $\longrightarrow$divide
$y=-5$
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