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9(3.14)h=45(3.14)
We move all terms to the left:
9(3.14)h-(45(3.14))=0
We add all the numbers together, and all the variables
9(3.14)h-141.3=0
We multiply parentheses
28.26h-141.3=0
We move all terms containing h to the left, all other terms to the right
28.26h=141.3
h=141.3/28.26
h=5
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