15=k+-9

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Solution for 15=k+-9 equation: 



15=k+-9

We move all terms to the left:

15-(k+-9)=0

We add all the numbers together, and all the variables

-(k-9)+15=0

We get rid of parentheses

-k+9+15=0

We add all the numbers together, and all the variables

-1k+24=0

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

-k=-24

k=-24/-1

k=+24

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