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