157=-3k+7(3k+7)

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Solution for 157=-3k+7(3k+7) equation: 



157=-3k+7(3k+7)

We move all terms to the left:

157-(-3k+7(3k+7))=0



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

-3k+7(3k+7)

We multiply parentheses

-3k+21k+49

We add all the numbers together, and all the variables

18k+49

Back to the equation:

-(18k+49)



We get rid of parentheses

-18k-49+157=0

We add all the numbers together, and all the variables

-18k+108=0

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

-18k=-108

k=-108/-18

k=+6

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