y=1/2*2-4 - solution

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Solution for y=1/2*2-4 equation:

y in (-oo:+oo)

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

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

y-1+4 = 0

y+3 = 0 // - 3

y = -3

y = -3

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