3/7d=5/15

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Solution for 3/7d=5/15 equation: 


d in (-oo:+oo)

(3/7)*d = 5/15 // - 5/15

(3/7)*d-(5/15) = 0

(3/7)*d-1/3 = 0

3/7*d-1/3 = 0 // + 1/3

3/7*d = 1/3 // : 3/7

d = 1/3/3/7

d = 7/9

d = 7/9

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