h+h+h=12

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Solution for h+h+h=12 equation: 



h+h+h=12

We move all terms to the left:

h+h+h-(12)=0

We add all the numbers together, and all the variables

3h-12=0

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

3h=12

h=12/3

h=4

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