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x in (-oo:+oo)
-1 = 5-((2*x)/3) // - 5-((2*x)/3)
(2*x)/3-5-1 = 0
2/3*x-6 = 0 // + 6
2/3*x = 6 // : 2/3
x = 6/2/3
x = 9
x = 9
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