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(9*u+1)/5 = (5*u-5)/6+2 // - (5*u-5)/6+2
(9*u+1)/5-((5*u-5)/6)-2 = 0
(9*u+1)/5+(-1*(5*u-5))/6-2 = 0
(6*(9*u+1))/(5*6)+(-1*5*(5*u-5))/(5*6)+(-2*5*6)/(5*6) = 0
6*(9*u+1)-1*5*(5*u-5)-2*5*6 = 0
29*u-60+31 = 0
29*u-29 = 0
(29*u-29)/(5*6) = 0
(29*u-29)/(5*6) = 0 // * 5*6
29*u-29 = 0
29*u-29 = 0 // + 29
29*u = 29 // : 29
u = 29/29
u = 1
u = 1
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