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x in (-oo:+oo)
(4*x+8)/2 = (2*x+5)/5 // - (2*x+5)/5
(4*x+8)/2-((2*x+5)/5) = 0
(4*x+8)/2+(-1*(2*x+5))/5 = 0
(5*(4*x+8))/(2*5)+(-1*2*(2*x+5))/(2*5) = 0
5*(4*x+8)-1*2*(2*x+5) = 0
16*x+30 = 0
(16*x+30)/(2*5) = 0
(16*x+30)/(2*5) = 0 // * 2*5
16*x+30 = 0
16*x+30 = 0 // - 30
16*x = -30 // : 16
x = -30/16
x = -15/8
x = -15/8
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