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3(y-7)=-7(7+y)
We move all terms to the left:
3(y-7)-(-7(7+y))=0
We add all the numbers together, and all the variables
3(y-7)-(-7(y+7))=0
We multiply parentheses
3y-(-7(y+7))-21=0
We calculate terms in parentheses: -(-7(y+7)), so:We get rid of parentheses
-7(y+7)
We multiply parentheses
-7y-49
Back to the equation:
-(-7y-49)
3y+7y+49-21=0
We add all the numbers together, and all the variables
10y+28=0
We move all terms containing y to the left, all other terms to the right
10y=-28
y=-28/10
y=-2+4/5
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