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x in (-oo:+oo)
3-(2*(x-3)) = 5/2 // - 5/2
3-(2*(x-3))-(5/2) = 0
3-2*(x-3)-5/2 = 0
(-2*2*(x-3))/2-5/2+(2*3)/2 = 0
2*3-2*2*(x-3)-5 = 0
6-4*x+7 = 0
13-4*x = 0
(13-4*x)/2 = 0
(13-4*x)/2 = 0 // * 2
13-4*x = 0
13-4*x = 0 // - 13
-4*x = -13 // : -4
x = -13/(-4)
x = 13/4
x = 13/4
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