4/q=5/7

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Solution for 4/q=5/7 equation: 


D( q )

q = 0

q = 0

q = 0

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

4/q = 5/7 // - 5/7

4/q-(5/7) = 0

4/q-5/7 = 0

4*q^-1 = 5/7 // : 4

q^-1 = 5/28

-1 < 0

1/(q^1) = 5/28 // * q^1

1 = 5/28*q^1 // : 5/28

28/5 = q^1

q = 28/5

q = 28/5

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