-15-3k=-3k-3(k-1)

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Solution for -15-3k=-3k-3(k-1) equation: 



-15-3k=-3k-3(k-1)

We move all terms to the left:

-15-3k-(-3k-3(k-1))=0



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

-3k-3(k-1)

We multiply parentheses

-3k-3k+3

We add all the numbers together, and all the variables

-6k+3

Back to the equation:

-(-6k+3)



We get rid of parentheses

-3k+6k-3-15=0

We add all the numbers together, and all the variables

3k-18=0

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

3k=18

k=18/3

k=6

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