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8a+5=3(a+7)
We move all terms to the left:
8a+5-(3(a+7))=0
We calculate terms in parentheses: -(3(a+7)), so:We get rid of parentheses
3(a+7)
We multiply parentheses
3a+21
Back to the equation:
-(3a+21)
8a-3a-21+5=0
We add all the numbers together, and all the variables
5a-16=0
We move all terms containing a to the left, all other terms to the right
5a=16
a=16/5
a=3+1/5
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