10/4=15/q

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Solution for 10/4=15/q equation: 


D( q )

q = 0

q = 0

q = 0

q in (-oo:0) U (0:+oo)

10/4 = 15/q // - 15/q

10/4-(15/q) = 0

10/4-15*q^-1 = 0

-15*q^-1 = -5/2 // : -15

q^-1 = 1/6

-1 < 0

1/(q^1) = 1/6 // * q^1

1 = 1/6*q^1 // : 1/6

6 = q^1

q = 6

q = 6

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