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x in (-oo:+oo)
Y-(-1/3) = 2*(x-(1/6)) // - 2*(x-(1/6))
Y-(2*(x-(1/6)))-(-1/3) = 0
Y-2*(x-1/6)+1/3 = 0
(-2*3*(x-1/6))/3+(3*Y)/3+1/3 = 0
3*Y-2*3*(x-1/6)+1 = 0
3*Y-6*x+1+1 = 0
3*Y-6*x+2 = 0
(3*Y-6*x+2)/3 = 0
(3*Y-6*x+2)/3 = 0 // * 3
3*Y-6*x+2 = 0
3*Y-6*x+2 = 0 // - 3*Y+2
-6*x = -(3*Y+2) // : -6
x = (-(3*Y+2))/(-6)
x = (3*Y+2)/6
x = (3*Y+2)/6
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