x/0.4x=2.5

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Solution for x/0.4x=2.5 equation: 


x in (-oo:+oo)

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

(x/0.4)*x-2.5 = 0

2.5*x^2 = 2.5 // : 2.5

x^2 = 1

x^2 = 1 // ^ 1/2

abs(x) = 1

x = 1 or x = -1

x in { 1, -1 }

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