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x in (-oo:+oo)
y+3 = (-5/3)*(x+8) // - (-5/3)*(x+8)
y-((-5/3)*(x+8))+3 = 0
(5/3)*(x+8)+y+3 = 0
5/3*(x+8)+y+3 = 0
5/3*(x+8)+y+3 = 0
5/3*x+y+3+40/3 = 0
5/3*x+y+49/3 = 0
5/3*x+y+49/3 = 0
5/3*x+y+49/3 = 0 // - y+49/3
5/3*x = -(y+49/3) // : 5/3
x = (-(y+49/3))/5/3
x = -3/5*(y+49/3)
x = -3/5*(y+49/3)
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