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x in (-oo:+oo)
1 = (7*x-4)/2+(2*x+5)/6 // - (7*x-4)/2+(2*x+5)/6
1-((7*x-4)/2)-((2*x+5)/6) = 0
(-1*(7*x-4))/2+(-1*(2*x+5))/6+1 = 0
(-1*6*(7*x-4))/(2*6)+(-1*2*(2*x+5))/(2*6)+(1*2*6)/(2*6) = 0
1*2*6-1*6*(7*x-4)-1*2*(2*x+5) = 0
12-46*x+14 = 0
26-46*x = 0
(26-46*x)/(2*6) = 0
(26-46*x)/(2*6) = 0 // * 2*6
26-46*x = 0
26-46*x = 0 // - 26
-46*x = -26 // : -46
x = -26/(-46)
x = 13/23
x = 13/23
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