3/7f=9

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Solution for 3/7f=9 equation: 


f in (-oo:+oo)

(3/7)*f = 9 // - 9

(3/7)*f-9 = 0

3/7*f-9 = 0 // + 9

3/7*f = 9 // : 3/7

f = 9/3/7

f = 21

f = 21

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