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-2a-16=-4(8a+4)
We move all terms to the left:
-2a-16-(-4(8a+4))=0
We calculate terms in parentheses: -(-4(8a+4)), so:We get rid of parentheses
-4(8a+4)
We multiply parentheses
-32a-16
Back to the equation:
-(-32a-16)
-2a+32a+16-16=0
We add all the numbers together, and all the variables
30a=0
a=0/30
a=0
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