91=7(k+4)

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Solution for 91=7(k+4) equation: 



91=7(k+4)

We move all terms to the left:

91-(7(k+4))=0



We calculate terms in parentheses: -(7(k+4)), so:

7(k+4)

We multiply parentheses

7k+28

Back to the equation:

-(7k+28)



We get rid of parentheses

-7k-28+91=0

We add all the numbers together, and all the variables

-7k+63=0

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

-7k=-63

k=-63/-7

k=+9

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