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5y-49=-2(y-7)
We move all terms to the left:
5y-49-(-2(y-7))=0
We calculate terms in parentheses: -(-2(y-7)), so:We get rid of parentheses
-2(y-7)
We multiply parentheses
-2y+14
Back to the equation:
-(-2y+14)
5y+2y-14-49=0
We add all the numbers together, and all the variables
7y-63=0
We move all terms containing y to the left, all other terms to the right
7y=63
y=63/7
y=9
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