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(2/3)*x+1/3 = 23/27 // - 23/27
(2/3)*x+1/3-(23/27) = 0
(2/3)*x+1/3-23/27 = 0
2/3*x-14/27 = 0 // + 14/27
2/3*x = 14/27 // : 2/3
x = 14/27/2/3
x = 7/9
x = 7/9
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