12h=7-9h

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Solution for 12h=7-9h equation: 



12h=7-9h

We move all terms to the left:

12h-(7-9h)=0

We add all the numbers together, and all the variables

12h-(-9h+7)=0

We get rid of parentheses

12h+9h-7=0

We add all the numbers together, and all the variables

21h-7=0

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

21h=7

h=7/21

h=1/3

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