x/(3-x)=1

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Solution for x/(3-x)=1 equation: 


D( x )

3-x = 0

3-x = 0

3-x = 0

3-x = 0 // - 3

-x = -3 // * -1

x = 3

x in (-oo:3) U (3:+oo)

x/(3-x) = 1 // - 1

x/(3-x)-1 = 0

x/(3-x)+(-1*(3-x))/(3-x) = 0

x-1*(3-x) = 0

2*x-3 = 0

(2*x-3)/(3-x) = 0

(2*x-3)/(3-x) = 0 // * 3-x

2*x-3 = 0

2*x-3 = 0 // + 3

2*x = 3 // : 2

x = 3/2

x = 3/2

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