12=h+-3

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Solution for 12=h+-3 equation: 



12=h+-3

We move all terms to the left:

12-(h+-3)=0

We add all the numbers together, and all the variables

-(h-3)+12=0

We get rid of parentheses

-h+3+12=0

We add all the numbers together, and all the variables

-1h+15=0

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

-h=-15

h=-15/-1

h=+15

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