1/2(4)-1=y

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Solution for 1/2(4)-1=y equation: 


y in (-oo:+oo)

4*(1/2)-1 = y // - y

4*(1/2)-y-1 = 0

1-y = 0 // - 1

-y = -1 // * -1

y = 1

y = 1

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