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5h+12=7(h+3)
We move all terms to the left:
5h+12-(7(h+3))=0
We calculate terms in parentheses: -(7(h+3)), so:We get rid of parentheses
7(h+3)
We multiply parentheses
7h+21
Back to the equation:
-(7h+21)
5h-7h-21+12=0
We add all the numbers together, and all the variables
-2h-9=0
We move all terms containing h to the left, all other terms to the right
-2h=9
h=9/-2
h=-4+1/2
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