21=7(k+58)

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Solution for 21=7(k+58) equation: 



21=7(k+58)

We move all terms to the left:

21-(7(k+58))=0



We calculate terms in parentheses: -(7(k+58)), so:

7(k+58)

We multiply parentheses

7k+406

Back to the equation:

-(7k+406)



We get rid of parentheses

-7k-406+21=0

We add all the numbers together, and all the variables

-7k-385=0

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

-7k=385

k=385/-7

k=-55

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