1/2=-2/5y

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Solution for 1/2=-2/5y equation: 


y in (-oo:+oo)

1/2 = (-2/5)*y // - (-2/5)*y

1/2-((-2/5)*y) = 0

(2/5)*y+1/2 = 0

2/5*y+1/2 = 0 // - 1/2

2/5*y = -1/2 // : 2/5

y = -1/2/2/5

y = -5/4

y = -5/4

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