5k-10k+-k-15k=-9

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Solution for 5k-10k+-k-15k=-9 equation: 



5k-10k+-k-15k=-9

We move all terms to the left:

5k-10k+-k-15k-(-9)=0

We add all the numbers together, and all the variables

-21k+9=0

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

-21k=-9

k=-9/-21

k=3/7

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