-21=-7(t+79)

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Solution for -21=-7(t+79) equation: 



-21=-7(t+79)

We move all terms to the left:

-21-(-7(t+79))=0



We calculate terms in parentheses: -(-7(t+79)), so:

-7(t+79)

We multiply parentheses

-7t-553

Back to the equation:

-(-7t-553)



We get rid of parentheses

7t+553-21=0

We add all the numbers together, and all the variables

7t+532=0

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

7t=-532

t=-532/7

t=-76

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