7000/1000=200/x

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Solution for 7000/1000=200/x equation: 


D( x )

x = 0

x = 0

x = 0

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

7000/1000 = 200/x // - 200/x

7000/1000-(200/x) = 0

7000/1000-200*x^-1 = 0

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

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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