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16=2(a+1)
We move all terms to the left:
16-(2(a+1))=0
We calculate terms in parentheses: -(2(a+1)), so:We get rid of parentheses
2(a+1)
We multiply parentheses
2a+2
Back to the equation:
-(2a+2)
-2a-2+16=0
We add all the numbers together, and all the variables
-2a+14=0
We move all terms containing a to the left, all other terms to the right
-2a=-14
a=-14/-2
a=+7
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