19=-2+7k

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Solution for 19=-2+7k equation: 



19=-2+7k

We move all terms to the left:

19-(-2+7k)=0

We add all the numbers together, and all the variables

-(7k-2)+19=0

We get rid of parentheses

-7k+2+19=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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