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x in (-oo:+oo)
Y-2 = (-4/9)*(x-2) // - (-4/9)*(x-2)
Y-((-4/9)*(x-2))-2 = 0
(4/9)*(x-2)+Y-2 = 0
4/9*(x-2)+Y-2 = 0
4/9*(x-2)+Y-2 = 0
Y+4/9*x-2-8/9 = 0
Y+4/9*x-26/9 = 0
Y+4/9*x-26/9 = 0
Y+4/9*x-26/9 = 0 // - Y-26/9
4/9*x = -(Y-26/9) // : 4/9
x = (-(Y-26/9))/4/9
x = 9/4*(26/9-Y)
x = 9/4*(26/9-Y)
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