7/x=(3/4)/90

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Solution for 7/x=(3/4)/90 equation: 


D( x )

x = 0

x = 0

x = 0

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

7/x = (3/4)/90 // - (3/4)/90

7/x-((3/4)/90) = 0

7/x-1/120 = 0

7*x^-1 = 1/120 // : 7

x^-1 = 1/840

-1 < 0

1/(x^1) = 1/840 // * x^1

1 = 1/840*x^1 // : 1/840

840 = x^1

x = 840

x = 840

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