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x in (-oo:+oo)
11/13 = x/65 // - x/65
11/13-(x/65) = 0
11/13-1/65*x = 0 // - 11/13
-1/65*x = -11/13 // : -1/65
x = -11/13/(-1/65)
x = 55
x = 55
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