7k+7=7(3k-9)

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Solution for 7k+7=7(3k-9) equation: 



7k+7=7(3k-9)

We move all terms to the left:

7k+7-(7(3k-9))=0



We calculate terms in parentheses: -(7(3k-9)), so:

7(3k-9)

We multiply parentheses

21k-63

Back to the equation:

-(21k-63)



We get rid of parentheses

7k-21k+63+7=0

We add all the numbers together, and all the variables

-14k+70=0

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

-14k=-70

k=-70/-14

k=+5

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