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x in (-oo:+oo)
(5/6)*x-(2/3) = 8 // - 8
(5/6)*x-(2/3)-8 = 0
(5/6)*x-2/3-8 = 0
5/6*x-26/3 = 0 // + 26/3
5/6*x = 26/3 // : 5/6
x = 26/3/5/6
x = 52/5
x = 52/5
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