13h+7h=-20

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Solution for 13h+7h=-20 equation: 



13h+7h=-20

We move all terms to the left:

13h+7h-(-20)=0

We add all the numbers together, and all the variables

20h+20=0

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

20h=-20

h=-20/20

h=-1

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