12h-7h-2h=9

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Solution for 12h-7h-2h=9 equation: 



12h-7h-2h=9

We move all terms to the left:

12h-7h-2h-(9)=0

We add all the numbers together, and all the variables

3h-9=0

We move all terms containing h to the left, all other terms to the right

3h=9

h=9/3

h=3

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