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x in (-oo:+oo)
2/13 = x/104 // - x/104
2/13-(x/104) = 0
2/13-1/104*x = 0 // - 2/13
-1/104*x = -2/13 // : -1/104
x = -2/13/(-1/104)
x = 16
x = 16
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