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