(1+2x)/(-1+x)=3

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Solution for (1+2x)/(-1+x)=3 equation: 


D( x )

x-1 = 0

x-1 = 0

x-1 = 0

x-1 = 0 // + 1

x = 1

x in (-oo:1) U (1:+oo)

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

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

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

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

4-x = 0

(4-x)/(x-1) = 0

(4-x)/(x-1) = 0 // * x-1

4-x = 0

4-x = 0 // - 4

-x = -4 // * -1

x = 4

x = 4

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