(18+2x)/(9-x)=2

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Solution for (18+2x)/(9-x)=2 equation: 


D( x )

9-x = 0

9-x = 0

9-x = 0

9-x = 0 // - 9

-x = -9 // * -1

x = 9

x in (-oo:9) U (9:+oo)

(2*x+18)/(9-x) = 2 // - 2

(2*x+18)/(9-x)-2 = 0

(2*x+18)/(9-x)+(-2*(9-x))/(9-x) = 0

2*x-2*(9-x)+18 = 0

4*x = 0

(4*x)/(9-x) = 0

(4*x)/(9-x) = 0 // * 9-x

4*x = 0

4*x = 0 // : 4

x = 0

x = 0

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