4*31-1=k

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Solution for 4*31-1=k equation: 



4*31-1=k

We move all terms to the left:

4*31-1-(k)=0

We add all the numbers together, and all the variables

-1k+123=0

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

-k=-123

k=-123/-1

k=+123

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