-9=3(1+4k)

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Solution for -9=3(1+4k) equation: 



-9=3(1+4k)

We move all terms to the left:

-9-(3(1+4k))=0

We add all the numbers together, and all the variables

-(3(4k+1))-9=0



We calculate terms in parentheses: -(3(4k+1)), so:

3(4k+1)

We multiply parentheses

12k+3

Back to the equation:

-(12k+3)



We get rid of parentheses

-12k-3-9=0

We add all the numbers together, and all the variables

-12k-12=0

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

-12k=12

k=12/-12

k=-1

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