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x in (-oo:+oo)
y+8 = (-3/2)*(x+1) // - (-3/2)*(x+1)
y-((-3/2)*(x+1))+8 = 0
(3/2)*(x+1)+y+8 = 0
3/2*(x+1)+y+8 = 0
3/2*(x+1)+y+8 = 0
3/2*x+y+3/2+8 = 0
3/2*x+y+19/2 = 0
3/2*x+y+19/2 = 0
3/2*x+y+19/2 = 0 // - y+19/2
3/2*x = -(y+19/2) // : 3/2
x = (-(y+19/2))/3/2
x = -2/3*(y+19/2)
x = -2/3*(y+19/2)
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