H(-3x-9)=-12x-36

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Solution for H(-3x-9)=-12x-36 equation: 



(-3H-9)=-12H-36

We move all terms to the left:

(-3H-9)-(-12H-36)=0

We get rid of parentheses

-3H+12H-9+36=0

We add all the numbers together, and all the variables

9H+27=0

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

9H=-27

H=-27/9

H=-3

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