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x in (-oo:+oo)
(8*x+3)/5-((11*x-9)/6)+(4*x+3)/15 = (11*x+15)/10 // - (11*x+15)/10
(8*x+3)/5-((11*x-9)/6)+(4*x+3)/15-((11*x+15)/10) = 0
(8*x+3)/5+(-1*(11*x-9))/6+(4*x+3)/15+(-1*(11*x+15))/10 = 0
(6*10*15*(8*x+3))/(5*6*10*15)+(-1*5*10*15*(11*x-9))/(5*6*10*15)+(5*6*10*(4*x+3))/(5*6*10*15)+(-1*5*6*15*(11*x+15))/(5*6*10*15) = 0
6*10*15*(8*x+3)-1*5*10*15*(11*x-9)+5*6*10*(4*x+3)-1*5*6*15*(11*x+15) = 0
1200*x-1050*x-4950*x-6750+900+9450 = 0
150*x-4950*x-6750+10350 = 0
3600-4800*x = 0
(3600-4800*x)/(5*6*10*15) = 0
(3600-4800*x)/(5*6*10*15) = 0 // * 5*6*10*15
3600-4800*x = 0
3600-4800*x = 0 // - 3600
-4800*x = -3600 // : -4800
x = -3600/(-4800)
x = 3/4
x = 3/4
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