3=9-12h

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Solution for 3=9-12h equation: 



3=9-12h

We move all terms to the left:

3-(9-12h)=0

We add all the numbers together, and all the variables

-(-12h+9)+3=0

We get rid of parentheses

12h-9+3=0

We add all the numbers together, and all the variables

12h-6=0

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

12h=6

h=6/12

h=1/2

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