15=3k-8k

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Solution for 15=3k-8k equation: 



15=3k-8k

We move all terms to the left:

15-(3k-8k)=0

We add all the numbers together, and all the variables

-(-5k)+15=0

We get rid of parentheses

5k+15=0

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

5k=-15

k=-15/5

k=-3

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