-1+7k=20

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Solution for -1+7k=20 equation: 



-1+7k=20

We move all terms to the left:

-1+7k-(20)=0

We add all the numbers together, and all the variables

7k-21=0

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

7k=21

k=21/7

k=3

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