x/(x+9)=0.1

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Solution for x/(x+9)=0.1 equation: 


D( x )

x+9 = 0

x+9 = 0

x+9 = 0

x+9 = 0 // - 9

x = -9

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

x/(x+9) = 0.1 // - 0.1

x/(x+9)-0.1 = 0

x/(x+9)+(-0.1*(x+9))/(x+9) = 0

x-0.1*(x+9) = 0

0.9*x-0.9 = 0

(0.9*x-0.9)/(x+9) = 0

(0.9*x-0.9)/(x+9) = 0 // * x+9

0.9*x-0.9 = 0

0.9*x-0.9 = 0 // + 0.9

0.9*x = 0.9 // : 0.9

x = 0.9/0.9

x = 1

x = 1

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