2800/70=3600/x

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Solution for 2800/70=3600/x equation: 


D( x )

x = 0

x = 0

x = 0

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

2800/70 = 3600/x // - 3600/x

2800/70-(3600/x) = 0

2800/70-3600*x^-1 = 0

-3600*x^-1 = -40 // : -3600

x^-1 = 1/90

-1 < 0

1/(x^1) = 1/90 // * x^1

1 = 1/90*x^1 // : 1/90

90 = x^1

x = 90

x = 90

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