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x in (-oo:+oo)
y-3 = (-4/9)*(x+2) // - (-4/9)*(x+2)
y-((-4/9)*(x+2))-3 = 0
(4/9)*(x+2)+y-3 = 0
4/9*(x+2)+y-3 = 0
4/9*(x+2)+y-3 = 0
4/9*x+y-3+8/9 = 0
4/9*x+y-19/9 = 0
4/9*x+y-19/9 = 0
4/9*x+y-19/9 = 0 // - y-19/9
4/9*x = -(y-19/9) // : 4/9
x = (-(y-19/9))/4/9
x = 9/4*(19/9-y)
x = 9/4*(19/9-y)
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