21=-2(h+7)

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Solution for 21=-2(h+7) equation: 



21=-2(h+7)

We move all terms to the left:

21-(-2(h+7))=0



We calculate terms in parentheses: -(-2(h+7)), so:

-2(h+7)

We multiply parentheses

-2h-14

Back to the equation:

-(-2h-14)



We get rid of parentheses

2h+14+21=0

We add all the numbers together, and all the variables

2h+35=0

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

2h=-35

h=-35/2

h=-17+1/2

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