7/10=20/x

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Solution for 7/10=20/x equation: 


D( x )

x = 0

x = 0

x = 0

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

7/10 = 20/x // - 20/x

7/10-(20/x) = 0

7/10-20*x^-1 = 0

-20*x^-1 = -7/10 // : -20

x^-1 = 7/200

-1 < 0

1/(x^1) = 7/200 // * x^1

1 = 7/200*x^1 // : 7/200

200/7 = x^1

x = 200/7

x = 200/7

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