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x in (-oo:+oo)
4-((7/8)*x) > 9 // - 9
4-((7/8)*x)-9 > 0
(-7/8)*x-9+4 > 0
-7/8*x-5 > 0 // + 5
-7/8*x > 5 // : -7/8
x < 5/(-7/8)
x < -40/7
x in (-oo:-40/7)
(-oo:-40/7)
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