k/20=21

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Solution for k/20=21 equation: 


k in (-oo:+oo)

k/20 = 21 // - 21

k/20-21 = 0

1/20*k-21 = 0 // + 21

1/20*k = 21 // : 1/20

k = 21/1/20

k = 420

k = 420

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