12/42=s/15

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Solution for 12/42=s/15 equation: 


s in (-oo:+oo)

12/42 = s/15 // - s/15

12/42-(s/15) = 0

2/7-1/15*s = 0 // - 2/7

-1/15*s = -2/7 // : -1/15

s = -2/7/(-1/15)

s = 30/7

s = 30/7

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