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39=7y+4(y-4)
We move all terms to the left:
39-(7y+4(y-4))=0
We calculate terms in parentheses: -(7y+4(y-4)), so:We get rid of parentheses
7y+4(y-4)
We multiply parentheses
7y+4y-16
We add all the numbers together, and all the variables
11y-16
Back to the equation:
-(11y-16)
-11y+16+39=0
We add all the numbers together, and all the variables
-11y+55=0
We move all terms containing y to the left, all other terms to the right
-11y=-55
y=-55/-11
y=+5
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