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(H)=-7H-9
We move all terms to the left:
(H)-(-7H-9)=0
We get rid of parentheses
H+7H+9=0
We add all the numbers together, and all the variables
8H+9=0
We move all terms containing H to the left, all other terms to the right
8H=-9
H=-9/8
H=-1+1/8
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