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12=h+(-8)
We move all terms to the left:
12-(h+(-8))=0
We calculate terms in parentheses: -(h+(-8)), so:We get rid of parentheses
h+(-8)
We add all the numbers together, and all the variables
h-8
Back to the equation:
-(h-8)
-h+8+12=0
We add all the numbers together, and all the variables
-1h+20=0
We move all terms containing h to the left, all other terms to the right
-h=-20
h=-20/-1
h=+20
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