-18k+9k+12k=-15

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Solution for -18k+9k+12k=-15 equation: 



-18k+9k+12k=-15

We move all terms to the left:

-18k+9k+12k-(-15)=0

We add all the numbers together, and all the variables

3k+15=0

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

3k=-15

k=-15/3

k=-5

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