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x in (-oo:+oo)
y-8 = (-2/11)*x+4 // - (-2/11)*x+4
y-((-2/11)*x)-8-4 = 0
(2/11)*x+y-8-4 = 0
2/11*x+y-12 = 0 // - y-12
2/11*x = -(y-12) // : 2/11
x = (-(y-12))/2/11
x = 11/2*(12-y)
x = 11/2*(12-y)
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