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(H)=-0.75H+42
We move all terms to the left:
(H)-(-0.75H+42)=0
We get rid of parentheses
H+0.75H-42=0
We add all the numbers together, and all the variables
1.75H-42=0
We move all terms containing H to the left, all other terms to the right
1.75H=42
H=42/1.75
H=24
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