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x in (-oo:+oo)
(5/9)*x-(2/3) = 2/9 // - 2/9
(5/9)*x-(2/3)-(2/9) = 0
(5/9)*x-2/3-2/9 = 0
5/9*x-8/9 = 0 // + 8/9
5/9*x = 8/9 // : 5/9
x = 8/9/5/9
x = 8/5
x = 8/5
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