9-4k=15-k

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Solution for 9-4k=15-k equation: 



9-4k=15-k

We move all terms to the left:

9-4k-(15-k)=0

We add all the numbers together, and all the variables

-4k-(-1k+15)+9=0

We get rid of parentheses

-4k+1k-15+9=0

We add all the numbers together, and all the variables

-3k-6=0

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

-3k=6

k=6/-3

k=-2

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