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(2/3)*x+1/2 = 19/54 // - 19/54
(2/3)*x+1/2-(19/54) = 0
(2/3)*x+1/2-19/54 = 0
2/3*x+4/27 = 0 // - 4/27
2/3*x = -4/27 // : 2/3
x = -4/27/2/3
x = -2/9
x = -2/9
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