(100-y)/y=0.2

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Solution for (100-y)/y=0.2 equation: 


D( y )

y = 0

y = 0

y = 0

y in (-oo:0) U (0:+oo)

(100-y)/y = 0.2 // - 0.2

(100-y)/y-0.2 = 0

(100-y)/y+(-0.2*y)/y = 0

100-y-0.2*y = 0

100-1.2*y = 0

(100-1.2*y)/y = 0

(100-1.2*y)/y = 0 // * y

100-1.2*y = 0

100-1.2*y = 0 // - 100

-1.2*y = -100 // : -1.2

y = -100/(-1.2)

y = 83.33333333

y = 83.33333333

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