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(5*x)/11-x = 3*(x-9) // - 3*(x-9)
(5*x)/11-(3*(x-9))-x = 0
(5*x)/11-3*(x-9)-x = 0
(-3*11*(x-9))/11+(5*x)/11+(11*(-x))/11 = 0
5*x-3*11*(x-9)+11*(-x) = 0
297-28*x-11*x = 0
297-39*x = 0
(297-39*x)/11 = 0
(297-39*x)/11 = 0 // * 11
297-39*x = 0
297-39*x = 0 // - 297
-39*x = -297 // : -39
x = -297/(-39)
x = 99/13
x = 99/13
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