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x in (-oo:+oo)
Y = (3/2)*x-8 // - (3/2)*x-8
Y-((3/2)*x)+8 = 0
Y+(-3/2)*x+8 = 0
Y-3/2*x+8 = 0 // - Y+8
-3/2*x = -(Y+8) // : -3/2
x = (-(Y+8))/(-3/2)
x = 2/3*(Y+8)
x = 2/3*(Y+8)
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