y/2y-9=2

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Solution for y/2y-9=2 equation: 


y in (-oo:+oo)

(y/2)*y-9 = 2 // - 2

(y/2)*y-9-2 = 0

1/2*y^2 = 11 // : 1/2

y^2 = 22

y^2 = 22 // ^ 1/2

abs(y) = 22^(1/2)

y = 22^(1/2) or y = -22^(1/2)

y in { 22^(1/2), -22^(1/2) }

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