63-7k=84

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Solution for 63-7k=84 equation: 



63-7k=84

We move all terms to the left:

63-7k-(84)=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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