x/(100-x)=0.28

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Solution for x/(100-x)=0.28 equation: 


D( x )

100-x = 0

100-x = 0

100-x = 0

100-x = 0 // - 100

-x = -100 // * -1

x = 100

x in (-oo:100) U (100:+oo)

x/(100-x) = 0.28 // - 0.28

x/(100-x)-0.28 = 0

x/(100-x)+(-0.28*(100-x))/(100-x) = 0

x-0.28*(100-x) = 0

1.28*x-28 = 0

(1.28*x-28)/(100-x) = 0

(1.28*x-28)/(100-x) = 0 // * 100-x

1.28*x-28 = 0

1.28*x-28 = 0 // + 28

1.28*x = 28 // : 1.28

x = 28/1.28

x = 21.875

x = 21.875

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