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x in (-oo:+oo)
(2*x)/3-(8/3) = x // - x
(2*x)/3-x-(8/3) = 0
(2*x)/3-x-8/3 = 0
-1/3*x-8/3 = 0 // + 8/3
-1/3*x = 8/3 // : -1/3
x = 8/3/(-1/3)
x = -8
x = -8
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