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x in (-oo:+oo)
y+1 = (8/9)*(x-3) // - (8/9)*(x-3)
y-((8/9)*(x-3))+1 = 0
(-8/9)*(x-3)+y+1 = 0
y-8/9*(x-3)+1 = 0
y-8/9*(x-3)+1 = 0
y-8/9*x+1+8/3 = 0
y-8/9*x+11/3 = 0
y-8/9*x+11/3 = 0
y-8/9*x+11/3 = 0 // - y+11/3
-8/9*x = -(y+11/3) // : -8/9
x = (-(y+11/3))/(-8/9)
x = 9/8*(y+11/3)
x = 9/8*(y+11/3)
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