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x in (-oo:+oo)
(2/3)*x-(8/3) = 3 // - 3
(2/3)*x-(8/3)-3 = 0
(2/3)*x-8/3-3 = 0
2/3*x-17/3 = 0 // + 17/3
2/3*x = 17/3 // : 2/3
x = 17/3/2/3
x = 17/2
x = 17/2
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