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5/12-4*x-(5*x)-(1/3) = 5/12 // - 5/12
5/12-4*x-(5*x)-(1/3)-(5/12) = 0
5/12-4*x-5*x-1/3-5/12 = 0
-9*x-1/3 = 0 // + 1/3
-9*x = 1/3 // : -9
x = 1/3/(-9)
x = -1/27
x = -1/27
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