21/x=105/5

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Solution for 21/x=105/5 equation: 


D( x )

x = 0

x = 0

x = 0

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

21/x = 105/5 // - 105/5

21/x-(105/5) = 0

21/x-21 = 0

21*x^-1 = 21 // : 21

x^-1 = 1

-1 < 0

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

1 = 1*x^1 // : 1

1 = x^1

x = 1

x = 1

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