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x in (-oo:+oo)
x/5-((x-1)/2) = 2*x // - 2*x
x/5-((x-1)/2)-(2*x) = 0
x/5-((x-1)/2)-2*x = 0
(-1*(x-1))/2+x/5-2*x = 0
(-1*5*(x-1))/(2*5)+(2*x)/(2*5)+(-2*2*5*x)/(2*5) = 0
2*x-1*5*(x-1)-2*2*5*x = 0
5-3*x-20*x = 0
5-23*x = 0
(5-23*x)/(2*5) = 0
(5-23*x)/(2*5) = 0 // * 2*5
5-23*x = 0
5-23*x = 0 // - 5
-23*x = -5 // : -23
x = -5/(-23)
x = 5/23
x = 5/23
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