28/7=36/x

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Solution for 28/7=36/x equation: 


D( x )

x = 0

x = 0

x = 0

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

28/7 = 36/x // - 36/x

28/7-(36/x) = 0

28/7-36*x^-1 = 0

-36*x^-1 = -4 // : -36

x^-1 = 1/9

-1 < 0

1/(x^1) = 1/9 // * x^1

1 = 1/9*x^1 // : 1/9

9 = x^1

x = 9

x = 9

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