3-8h=-21

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Solution for 3-8h=-21 equation: 



3-8h=-21

We move all terms to the left:

3-8h-(-21)=0

We add all the numbers together, and all the variables

-8h+24=0

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

-8h=-24

h=-24/-8

h=+3

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