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x in (-oo:+oo)
y+3 = (-3/2)*(x+4) // - (-3/2)*(x+4)
y-((-3/2)*(x+4))+3 = 0
(3/2)*(x+4)+y+3 = 0
3/2*(x+4)+y+3 = 0
3/2*(x+4)+y+3 = 0
3/2*x+y+3+6 = 0
3/2*x+y+9 = 0
3/2*x+y+9 = 0
3/2*x+y+9 = 0 // - y+9
3/2*x = -(y+9) // : 3/2
x = (-(y+9))/3/2
x = -2/3*(y+9)
x = -2/3*(y+9)
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