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