-21=7(k+2)

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



-21=7(k+2)

We move all terms to the left:

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



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

7(k+2)

We multiply parentheses

7k+14

Back to the equation:

-(7k+14)



We get rid of parentheses

-7k-14-21=0

We add all the numbers together, and all the variables

-7k-35=0

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

-7k=35

k=35/-7

k=-5

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