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5a+8=-(2a+5)
We move all terms to the left:
5a+8-(-(2a+5))=0
We calculate terms in parentheses: -(-(2a+5)), so:We get rid of parentheses
-(2a+5)
We get rid of parentheses
-2a-5
Back to the equation:
-(-2a-5)
5a+2a+5+8=0
We add all the numbers together, and all the variables
7a+13=0
We move all terms containing a to the left, all other terms to the right
7a=-13
a=-13/7
a=-1+6/7
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