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(2/3)*x-x-(5/12)-(1/2) = 0
(2/3)*x-x-5/12-1/2 = 0
-1/3*x-11/12 = 0 // + 11/12
-1/3*x = 11/12 // : -1/3
x = 11/12/(-1/3)
x = -11/4
x = -11/4
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