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x in (-oo:+oo)
81*(272/3) = 3*x // - 3*x
81*(272/3)-(3*x) = 0
81*(272/3)-3*x = 0
7344-3*x = 0 // - 7344
-3*x = -7344 // : -3
x = -7344/(-3)
x = 2448
x = 2448
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