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(1/3)*(10*x-9) = 8 // - 8
(1/3)*(10*x-9)-8 = 0
1/3*(10*x-9)-8 = 0
1/3*(10*x-9)-8 = 0
10/3*x-11 = 0
10/3*x-11 = 0
10/3*x-11 = 0 // + 11
10/3*x = 11 // : 10/3
x = 11/10/3
x = 33/10
x = 33/10
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