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x in (-oo:+oo)
3 = 8-((3/8)*x) // - 8-((3/8)*x)
(3/8)*x-8+3 = 0
3/8*x-5 = 0 // + 5
3/8*x = 5 // : 3/8
x = 5/3/8
x = 40/3
x = 40/3
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