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20+5.50h=15+6.50
We move all terms to the left:
20+5.50h-(15+6.50)=0
We add all the numbers together, and all the variables
5.50h+20-(21.5)=0
We add all the numbers together, and all the variables
5.50h-1.5=0
We move all terms containing h to the left, all other terms to the right
5.50h=1.5
h=1.5/5.50
h=1/3.6666666666667
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