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x in (-oo:+oo)
1-((5/8)*x) > 8 // - 8
1-((5/8)*x)-8 > 0
(-5/8)*x-8+1 > 0
-5/8*x-7 > 0 // + 7
-5/8*x > 7 // : -5/8
x < 7/(-5/8)
x < -56/5
x in (-oo:-56/5)
(-oo:-56/5)
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