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