3/(4-x)=2

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Solution for 3/(4-x)=2 equation: 


D( x )

4-x = 0

4-x = 0

4-x = 0

4-x = 0 // - 4

-x = -4 // * -1

x = 4

x in (-oo:4) U (4:+oo)

3/(4-x) = 2 // - 2

3/(4-x)-2 = 0

3/(4-x)+(-2*(4-x))/(4-x) = 0

3-2*(4-x) = 0

2*x-5 = 0

(2*x-5)/(4-x) = 0

(2*x-5)/(4-x) = 0 // * 4-x

2*x-5 = 0

2*x-5 = 0 // + 5

2*x = 5 // : 2

x = 5/2

x = 5/2

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