12=3(h-3)

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Solution for 12=3(h-3) equation: 



12=3(h-3)

We move all terms to the left:

12-(3(h-3))=0



We calculate terms in parentheses: -(3(h-3)), so:

3(h-3)

We multiply parentheses

3h-9

Back to the equation:

-(3h-9)



We get rid of parentheses

-3h+9+12=0

We add all the numbers together, and all the variables

-3h+21=0

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

-3h=-21

h=-21/-3

h=+7

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