12=-7h-9

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Solution for 12=-7h-9 equation: 



12=-7h-9

We move all terms to the left:

12-(-7h-9)=0

We get rid of parentheses

7h+9+12=0

We add all the numbers together, and all the variables

7h+21=0

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

7h=-21

h=-21/7

h=-3

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