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x in (-oo:+oo)
y+3 = (1/3)*(x-2) // - (1/3)*(x-2)
y-((1/3)*(x-2))+3 = 0
(-1/3)*(x-2)+y+3 = 0
y-1/3*(x-2)+3 = 0
y-1/3*(x-2)+3 = 0
y-1/3*x+2/3+3 = 0
y-1/3*x+11/3 = 0
y-1/3*x+11/3 = 0
y-1/3*x+11/3 = 0 // - y+11/3
-1/3*x = -(y+11/3) // : -1/3
x = (-(y+11/3))/(-1/3)
x = 3*(y+11/3)
x = 3*(y+11/3)
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