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x in (-oo:+oo)
Y = (3*x)/4-(13/2) // - (3*x)/4-(13/2)
Y-((3*x)/4)+13/2 = 0
Y+(-3/4)*x+13/2 = 0
Y-3/4*x+13/2 = 0 // - Y+13/2
-3/4*x = -(Y+13/2) // : -3/4
x = (-(Y+13/2))/(-3/4)
x = 4/3*(Y+13/2)
x = 4/3*(Y+13/2)
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