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x in (-oo:+oo)
y = (-3/2)*x+1/2 // - (-3/2)*x+1/2
y-((-3/2)*x)-(1/2) = 0
(3/2)*x+y-1/2 = 0
3/2*x+y-1/2 = 0 // - y-1/2
3/2*x = -(y-1/2) // : 3/2
x = (-(y-1/2))/3/2
x = 2/3*(1/2-y)
x = 2/3*(1/2-y)
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