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8a+6-a=(a-4)
We move all terms to the left:
8a+6-a-((a-4))=0
We add all the numbers together, and all the variables
7a-((a-4))+6=0
We calculate terms in parentheses: -((a-4)), so:We get rid of parentheses
(a-4)
We get rid of parentheses
a-4
Back to the equation:
-(a-4)
7a-a+4+6=0
We add all the numbers together, and all the variables
6a+10=0
We move all terms containing a to the left, all other terms to the right
6a=-10
a=-10/6
a=-1+2/3
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