x/21=3

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Solution for x/21=3 equation: 


x in (-oo:+oo)

x/21 = 3 // - 3

x/21-3 = 0

1/21*x-3 = 0 // + 3

1/21*x = 3 // : 1/21

x = 3/1/21

x = 63

x = 63

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