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-4y+12=-2(4y+12)
We move all terms to the left:
-4y+12-(-2(4y+12))=0
We calculate terms in parentheses: -(-2(4y+12)), so:We get rid of parentheses
-2(4y+12)
We multiply parentheses
-8y-24
Back to the equation:
-(-8y-24)
-4y+8y+24+12=0
We add all the numbers together, and all the variables
4y+36=0
We move all terms containing y to the left, all other terms to the right
4y=-36
y=-36/4
y=-9
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