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-28=-9+8(a+6)
We move all terms to the left:
-28-(-9+8(a+6))=0
We calculate terms in parentheses: -(-9+8(a+6)), so:We get rid of parentheses
-9+8(a+6)
determiningTheFunctionDomain 8(a+6)-9
We multiply parentheses
8a+48-9
We add all the numbers together, and all the variables
8a+39
Back to the equation:
-(8a+39)
-8a-39-28=0
We add all the numbers together, and all the variables
-8a-67=0
We move all terms containing a to the left, all other terms to the right
-8a=67
a=67/-8
a=-8+3/8
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