30=3h+12

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Solution for 30=3h+12 equation: 



30=3h+12

We move all terms to the left:

30-(3h+12)=0

We get rid of parentheses

-3h-12+30=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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