12=3h+30

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Solution for 12=3h+30 equation: 



12=3h+30

We move all terms to the left:

12-(3h+30)=0

We get rid of parentheses

-3h-30+12=0

We add all the numbers together, and all the variables

-3h-18=0

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

-3h=18

h=18/-3

h=-6

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