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x in (-oo:+oo)
5/11 = x/121 // - x/121
5/11-(x/121) = 0
5/11-1/121*x = 0 // - 5/11
-1/121*x = -5/11 // : -1/121
x = -5/11/(-1/121)
x = 55
x = 55
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