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30h+8.75+11=400
We move all terms to the left:
30h+8.75+11-(400)=0
We add all the numbers together, and all the variables
30h-380.25=0
We move all terms containing h to the left, all other terms to the right
30h=380.25
h=380.25/30
h=12+1.9756097561/2.92682926829
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