21+6h=-3(9h-7)

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Solution for 21+6h=-3(9h-7) equation: 



21+6h=-3(9h-7)

We move all terms to the left:

21+6h-(-3(9h-7))=0



We calculate terms in parentheses: -(-3(9h-7)), so:

-3(9h-7)

We multiply parentheses

-27h+21

Back to the equation:

-(-27h+21)



We get rid of parentheses

6h+27h-21+21=0

We add all the numbers together, and all the variables

33h=0

h=0/33

h=0

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