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-13=-7y+2(y+6)
We move all terms to the left:
-13-(-7y+2(y+6))=0
We calculate terms in parentheses: -(-7y+2(y+6)), so:We get rid of parentheses
-7y+2(y+6)
We multiply parentheses
-7y+2y+12
We add all the numbers together, and all the variables
-5y+12
Back to the equation:
-(-5y+12)
5y-12-13=0
We add all the numbers together, and all the variables
5y-25=0
We move all terms containing y to the left, all other terms to the right
5y=25
y=25/5
y=5
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