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x in (-oo:+oo)
-3/9 = 3-((4/9)*x) // - 3-((4/9)*x)
(4/9)*x-3/9-3 = 0
4/9*x-10/3 = 0 // + 10/3
4/9*x = 10/3 // : 4/9
x = 10/3/4/9
x = 15/2
x = 15/2
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