31-2k=10

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Solution for 31-2k=10 equation: 



31-2k=10

We move all terms to the left:

31-2k-(10)=0

We add all the numbers together, and all the variables

-2k+21=0

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

-2k=-21

k=-21/-2

k=10+1/2

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