9/10=10/q

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Solution for 9/10=10/q equation: 


D( q )

q = 0

q = 0

q = 0

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

9/10 = 10/q // - 10/q

9/10-(10/q) = 0

9/10-10*q^-1 = 0

-10*q^-1 = -9/10 // : -10

q^-1 = 9/100

-1 < 0

1/(q^1) = 9/100 // * q^1

1 = 9/100*q^1 // : 9/100

100/9 = q^1

q = 100/9

q = 100/9

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