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x in (-oo:+oo)
y = (5*x-3)/4 // - (5*x-3)/4
y-((5*x-3)/4) = 0
(-1*(5*x-3))/4+y = 0
(-1*(5*x-3))/4+(4*y)/4 = 0
4*y-1*(5*x-3) = 0
4*y-5*x+3 = 0
(4*y-5*x+3)/4 = 0
(4*y-5*x+3)/4 = 0 // * 4
4*y-5*x+3 = 0
4*y-5*x+3 = 0 // - 4*y+3
-5*x = -(4*y+3) // : -5
x = (-(4*y+3))/(-5)
x = (4*y+3)/5
x = (4*y+3)/5
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