x/20=21 - solution

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Solution for x/20=21 equation:

x in (-oo:+oo)

x/20 = 21 // - 21

x/20-21 = 0

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

1/20*x = 21 // : 1/20

x = 21/1/20

x = 420

x = 420

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