-1+3k=20

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Solution for -1+3k=20 equation: 



-1+3k=20

We move all terms to the left:

-1+3k-(20)=0

We add all the numbers together, and all the variables

3k-21=0

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

3k=21

k=21/3

k=7

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