400/8/21=x - solution

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Solution for 400/8/21=x equation:

x in (-oo:+oo)

(400/8)/21 = x // - x

(400/8)/21-x = 0

50/21-x = 0 // - 50/21

-x = -50/21 // * -1

x = 50/21

x = 50/21

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