2.8/4=7/q

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Solution for 2.8/4=7/q equation: 


D( q )

q = 0

q = 0

q = 0

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

2.8/4 = 7/q // - 7/q

2.8/4-(7/q) = 0

2.8/4-7*q^-1 = 0

-7*q^-1 = -0.7 // : -7

q^-1 = 0.1

-1 < 0

1/(q^1) = 0.1 // * q^1

1 = 0.1*q^1 // : 0.1

10 = q^1

q = 10

q = 10

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