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(8a+10)-(2a=5)
We move all terms to the left:
(8a+10)-(2a-(5))=0
We get rid of parentheses
8a-2a+10+5=0
We add all the numbers together, and all the variables
6a+15=0
We move all terms containing a to the left, all other terms to the right
6a=-15
a=-15/6
a=-2+1/2
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