(((4/5)x)^2)=1

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Solution for (((4/5)x)^2)=1 equation: 


x in (-oo:+oo)

((4/5)*x)^2 = 1 // - 1

((4/5)*x)^2-1 = 0

16/25*x^2 = 1 // : 16/25

x^2 = 25/16

x^2 = 25/16 // ^ 1/2

abs(x) = 5/4

x = 5/4 or x = -5/4

x in { 5/4, -5/4 }

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