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x in (-oo:+oo)
-2*x-8 = 2*x-14/3 // - 2*x-14/3
-2*x-(2*x)-(-14/3)-8 = 0
14/3-2*x-2*x-8 = 0
-4*x-10/3 = 0 // + 10/3
-4*x = 10/3 // : -4
x = 10/3/(-4)
x = -5/6
x = -5/6
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