-3h+-9h=12

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Solution for -3h+-9h=12 equation: 



-3h+-9h=12

We move all terms to the left:

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

determiningTheFunctionDomain
-3h-9h-12+=0

We add all the numbers together, and all the variables

-12h=0

h=0/-12

h=0

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