1=3+k/21

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Solution for 1=3+k/21 equation: 



1=3+k/21

We move all terms to the left:

1-(3+k/21)=0

We add all the numbers together, and all the variables

-(k/21+3)+1=0

We get rid of parentheses

-k/21-3+1=0

We multiply all the terms by the denominator


-k-3*21+1*21=0

We add all the numbers together, and all the variables

-1k-42=0

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

-k=42

k=42/-1

k=-42

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