x/2.5x=0,4

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Solution for x/2.5x=0,4 equation: 


x in (-oo:+oo)

(x/2.5)*x = 0.4 // - 0.4

(x/2.5)*x-0.4 = 0

0.4*x^2 = 0.4 // : 0.4

x^2 = 1

x^2 = 1 // ^ 1/2

abs(x) = 1

x = 1 or x = -1

x in { 1, -1 }

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