2/120=7/x

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Solution for 2/120=7/x equation: 


D( x )

x = 0

x = 0

x = 0

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

2/120 = 7/x // - 7/x

2/120-(7/x) = 0

2/120-7*x^-1 = 0

-7*x^-1 = -1/60 // : -7

x^-1 = 1/420

-1 < 0

1/(x^1) = 1/420 // * x^1

1 = 1/420*x^1 // : 1/420

420 = x^1

x = 420

x = 420

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