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x in (-oo:+oo)
5/3 = x/11 // - x/11
5/3-(x/11) = 0
5/3-1/11*x = 0 // - 5/3
-1/11*x = -5/3 // : -1/11
x = -5/3/(-1/11)
x = 55/3
x = 55/3
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