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6a+15=3(2a+5)
We move all terms to the left:
6a+15-(3(2a+5))=0
We calculate terms in parentheses: -(3(2a+5)), so:We get rid of parentheses
3(2a+5)
We multiply parentheses
6a+15
Back to the equation:
-(6a+15)
6a-6a-15+15=0
We add all the numbers together, and all the variables
=0
a=0/1
a=0
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