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11.81=7.81+2h
We move all terms to the left:
11.81-(7.81+2h)=0
We add all the numbers together, and all the variables
-(2h+7.81)+11.81=0
We get rid of parentheses
-2h-7.81+11.81=0
We add all the numbers together, and all the variables
-2h+4=0
We move all terms containing h to the left, all other terms to the right
-2h=-4
h=-4/-2
h=+2
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