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9*(x-(8/9)) = 9*1^9*(-x/8) // - 9*1^9*(-x/8)
9*(x-(8/9))-(9*1^9*(-x/8)) = 0
9*(x-8/9)+(9/8)*x = 0
9*(x-8/9)+(9*x)/8 = 0
(8*9*(x-8/9))/8+(9*x)/8 = 0
8*9*(x-8/9)+9*x = 0
81*x-64 = 0
(81*x-64)/8 = 0
(81*x-64)/8 = 0 // * 8
81*x-64 = 0
81*x-64 = 0 // + 64
81*x = 64 // : 81
x = 64/81
x = 64/81
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