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