O=3(t+7)

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Solution for O=3(t+7) equation: 



=3(O+7)

We move all terms to the left:

-(3(O+7))=0



We calculate terms in parentheses: -(3(O+7)), so:

3(O+7)

We multiply parentheses

3O+21

Back to the equation:

-(3O+21)



We get rid of parentheses

-3O-21=0

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

-3O=21

O=21/-3

O=-7

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