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8=12-2h
We move all terms to the left:
8-(12-2h)=0
We add all the numbers together, and all the variables
-(-2h+12)+8=0
We get rid of parentheses
2h-12+8=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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