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-0.3h=0.9h+3.12
We move all terms to the left:
-0.3h-(0.9h+3.12)=0
We get rid of parentheses
-0.3h-0.9h-3.12=0
We add all the numbers together, and all the variables
-1.2h-3.12=0
We move all terms containing h to the left, all other terms to the right
-1.2h=3.12
h=3.12/-1.2
h=-2+0.72/1.2
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