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x in (-oo:+oo)
(3*x)/26 = 2/13 // - 2/13
(3*x)/26-(2/13) = 0
(3*x)/26-2/13 = 0
3/26*x-2/13 = 0 // + 2/13
3/26*x = 2/13 // : 3/26
x = 2/13/3/26
x = 4/3
x = 4/3
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