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7a=(3a+4)
We move all terms to the left:
7a-((3a+4))=0
We calculate terms in parentheses: -((3a+4)), so:We get rid of parentheses
(3a+4)
We get rid of parentheses
3a+4
Back to the equation:
-(3a+4)
7a-3a-4=0
We add all the numbers together, and all the variables
4a-4=0
We move all terms containing a to the left, all other terms to the right
4a=4
a=4/4
a=1
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