31=2k-49

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Solution for 31=2k-49 equation: 



31=2k-49

We move all terms to the left:

31-(2k-49)=0

We get rid of parentheses

-2k+49+31=0

We add all the numbers together, and all the variables

-2k+80=0

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

-2k=-80

k=-80/-2

k=+40

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