h=-2h-9

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Solution for h=-2h-9 equation: 



h=-2h-9

We move all terms to the left:

h-(-2h-9)=0

We get rid of parentheses

h+2h+9=0

We add all the numbers together, and all the variables

3h+9=0

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

3h=-9

h=-9/3

h=-3

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