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12=3(h-4)
We move all terms to the left:
12-(3(h-4))=0
We calculate terms in parentheses: -(3(h-4)), so:We get rid of parentheses
3(h-4)
We multiply parentheses
3h-12
Back to the equation:
-(3h-12)
-3h+12+12=0
We add all the numbers together, and all the variables
-3h+24=0
We move all terms containing h to the left, all other terms to the right
-3h=-24
h=-24/-3
h=+8
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