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(h+4)=-2h
We move all terms to the left:
(h+4)-(-2h)=0
We get rid of parentheses
h+2h+4=0
We add all the numbers together, and all the variables
3h+4=0
We move all terms containing h to the left, all other terms to the right
3h=-4
h=-4/3
h=-1+1/3
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