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8a-2=3a+15
We move all terms to the left:
8a-2-(3a+15)=0
We get rid of parentheses
8a-3a-15-2=0
We add all the numbers together, and all the variables
5a-17=0
We move all terms containing a to the left, all other terms to the right
5a=17
a=17/5
a=3+2/5
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