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(9*u-3)/8 = 6-((2*u-7)/4) // - 6-((2*u-7)/4)
(9*u-3)/8+(2*u-7)/4-6 = 0
(4*(9*u-3))/(4*8)+(8*(2*u-7))/(4*8)+(-6*4*8)/(4*8) = 0
4*(9*u-3)+8*(2*u-7)-6*4*8 = 0
52*u-192-68 = 0
52*u-260 = 0
(52*u-260)/(4*8) = 0
(52*u-260)/(4*8) = 0 // * 4*8
52*u-260 = 0
52*u-260 = 0 // + 260
52*u = 260 // : 52
u = 260/52
u = 5
u = 5
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