50/70=100/x

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Solution for 50/70=100/x equation: 


D( x )

x = 0

x = 0

x = 0

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

50/70 = 100/x // - 100/x

50/70-(100/x) = 0

50/70-100*x^-1 = 0

-100*x^-1 = -5/7 // : -100

x^-1 = 1/140

-1 < 0

1/(x^1) = 1/140 // * x^1

1 = 1/140*x^1 // : 1/140

140 = x^1

x = 140

x = 140

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