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12=3(2h-6)
We move all terms to the left:
12-(3(2h-6))=0
We calculate terms in parentheses: -(3(2h-6)), so:We get rid of parentheses
3(2h-6)
We multiply parentheses
6h-18
Back to the equation:
-(6h-18)
-6h+18+12=0
We add all the numbers together, and all the variables
-6h+30=0
We move all terms containing h to the left, all other terms to the right
-6h=-30
h=-30/-6
h=+5
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