21/x+1=7/4

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Solution for 21/x+1=7/4 equation: 


D( x )

x = 0

x = 0

x = 0

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

21/x+1 = 7/4 // - 7/4

21/x-(7/4)+1 = 0

21/x-7/4+1 = 0

21*x^-1 = 3/4 // : 21

x^-1 = 1/28

-1 < 0

1/(x^1) = 1/28 // * x^1

1 = 1/28*x^1 // : 1/28

28 = x^1

x = 28

x = 28

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