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