21/q=3/4/7

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Solution for 21/q=3/4/7 equation: 


D( q )

q = 0

q = 0

q = 0

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

21/q = (3/4)/7 // - (3/4)/7

21/q-((3/4)/7) = 0

21/q-3/28 = 0

21*q^-1 = 3/28 // : 21

q^-1 = 1/196

-1 < 0

1/(q^1) = 1/196 // * q^1

1 = 1/196*q^1 // : 1/196

196 = q^1

q = 196

q = 196

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