0.4x/0.4x-y=4

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Solution for 0.4x/0.4x-y=4 equation: 


x in (-oo:+oo)

((0.4*x)/0.4)*x-y = 4 // - 4

((0.4*x)/0.4)*x-y-4 = 0

1*x^2 = -(-y-4) // : 1

x^2 = y+4

x^2 = y+4 // ^ 1/2

abs(x) = (y+4)^(1/2)

x = (y+4)^(1/2) or x = -(y+4)^(1/2)

x in { (y+4)^(1/2), -(y+4)^(1/2) }

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