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x in (-oo:+oo)
5/8-((x-3)/5) = (3*x)/10 // - (3*x)/10
5/8-((x-3)/5)-((3*x)/10) = 0
(-3/10)*x-((x-3)/5)+5/8 = 0
(-1*(x-3))/5+(-3*x)/10+5/8 = 0
(-1*8*10*(x-3))/(5*8*10)+(-3*5*8*x)/(5*8*10)+(10*5^2)/(5*8*10) = 0
10*5^2-1*8*10*(x-3)-3*5*8*x = 0
240-200*x+250 = 0
490-200*x = 0
(490-200*x)/(5*8*10) = 0
(490-200*x)/(5*8*10) = 0 // * 5*8*10
490-200*x = 0
490-200*x = 0 // - 490
-200*x = -490 // : -200
x = -490/(-200)
x = 49/20
x = 49/20
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