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2(3.14)(6)(h)+2(3.14)(6^2)=602.88
We move all terms to the left:
2(3.14)(6)(h)+2(3.14)(6^2)-(602.88)=0
We add all the numbers together, and all the variables
2(3.14)6h-376.8=0
We multiply parentheses
37.68h-376.8=0
We move all terms containing h to the left, all other terms to the right
37.68h=376.8
h=376.8/37.68
h=10
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