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x in (-oo:+oo)
17 = 8*x+13/5 // - 8*x+13/5
17-(8*x)-(13/5) = 0
17-8*x-13/5 = 0
72/5-8*x = 0 // - 72/5
-8*x = -72/5 // : -8
x = -72/5/(-8)
x = 9/5
x = 9/5
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