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x in (-oo:+oo)
-4*x-6 = -16/3 // + -16/3
-4*x-(-16/3)-6 = 0
16/3-4*x-6 = 0
-4*x-2/3 = 0 // + 2/3
-4*x = 2/3 // : -4
x = 2/3/(-4)
x = -1/6
x = -1/6
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