21+3h=(h+7)

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



21+3h=(h+7)

We move all terms to the left:

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



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

(h+7)

We get rid of parentheses

h+7

Back to the equation:

-(h+7)



We get rid of parentheses

3h-h-7+21=0

We add all the numbers together, and all the variables

2h+14=0

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

2h=-14

h=-14/2

h=-7

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