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3*x-x-(1/2)-(2/6) = 4*x-(5/2) // - 4*x-(5/2)
3*x-x-(4*x)-(1/2)-(2/6)+5/2 = 0
3*x-x-4*x-1/2-1/3+5/2 = 0
5/3-2*x = 0 // - 5/3
-2*x = -5/3 // : -2
x = -5/3/(-2)
x = 5/6
x = 5/6
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