9x/21=3

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Solution for 9x/21=3 equation: 


x in (-oo:+oo)

(9*x)/21 = 3 // - 3

(9*x)/21-3 = 0

3/7*x-3 = 0 // + 3

3/7*x = 3 // : 3/7

x = 3/3/7

x = 7

x = 7

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