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