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63=7(h-78)
We move all terms to the left:
63-(7(h-78))=0
We calculate terms in parentheses: -(7(h-78)), so:We get rid of parentheses
7(h-78)
We multiply parentheses
7h-546
Back to the equation:
-(7h-546)
-7h+546+63=0
We add all the numbers together, and all the variables
-7h+609=0
We move all terms containing h to the left, all other terms to the right
-7h=-609
h=-609/-7
h=+87
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