x-(x*20/100)=80

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Solution for x-(x*20/100)=80 equation: 


x in (-oo:+oo)

x-((20*x)/100) = 80 // - 80

x-((20*x)/100)-80 = 0

x+(-1/5)*x-80 = 0

4/5*x-80 = 0 // + 80

4/5*x = 80 // : 4/5

x = 80/4/5

x = 100

x = 100

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