15=18-2k-31

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Solution for 15=18-2k-31 equation: 



15=18-2k-31

We move all terms to the left:

15-(18-2k-31)=0

We add all the numbers together, and all the variables

-(-2k-13)+15=0

We get rid of parentheses

2k+13+15=0

We add all the numbers together, and all the variables

2k+28=0

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

2k=-28

k=-28/2

k=-14

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