31=7(9k+3)

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Solution for 31=7(9k+3) equation: 



31=7(9k+3)

We move all terms to the left:

31-(7(9k+3))=0



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

7(9k+3)

We multiply parentheses

63k+21

Back to the equation:

-(63k+21)



We get rid of parentheses

-63k-21+31=0

We add all the numbers together, and all the variables

-63k+10=0

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

-63k=-10

k=-10/-63

k=10/63

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