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x in (-oo:+oo)
9/11 = x/66 // - x/66
9/11-(x/66) = 0
9/11-1/66*x = 0 // - 9/11
-1/66*x = -9/11 // : -1/66
x = -9/11/(-1/66)
x = 54
x = 54
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