20=x-(x*20/100)

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Solution for 20=x-(x*20/100) equation: 


x in (-oo:+oo)

20 = x-((20*x)/100) // - x-((20*x)/100)

(20*x)/100-x+20 = 0

20-4/5*x = 0 // - 20

-4/5*x = -20 // : -4/5

x = -20/(-4/5)

x = 25

x = 25

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