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x in (-oo:+oo)
x-(4*x)-(3/2)-(1/6) = 2/3 // - 2/3
x-(4*x)-(3/2)-(1/6)-(2/3) = 0
x-4*x-3/2-1/6-2/3 = 0
-3*x-7/3 = 0 // + 7/3
-3*x = 7/3 // : -3
x = 7/3/(-3)
x = -7/9
x = -7/9
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