-21=2.1h

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Solution for -21=2.1h equation: 



-21=2.1h

We move all terms to the left:

-21-(2.1h)=0

We add all the numbers together, and all the variables

-(+2.1h)-21=0

We get rid of parentheses

-2.1h-21=0

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

-2.1h=21

h=21/-2.1

h=-10

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