12h-6=15h+21

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Solution for 12h-6=15h+21 equation: 



12h-6=15h+21

We move all terms to the left:

12h-6-(15h+21)=0

We get rid of parentheses

12h-15h-21-6=0

We add all the numbers together, and all the variables

-3h-27=0

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

-3h=27

h=27/-3

h=-9

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