	Doraemon \| Chat Online
	08/03/2018 13:08:38
	Toán học - Lớp 6 \| Toán học \| Lớp 6

Tìm x ∈ Z biết: 5/17 + -4/9 + -30/31+ 12/17+ -11/31 < x/9 ≤ -3/7+ 7/15 + 4/-7 + 8/15 + 2/3

Tìm x ∈ Z biết:
a) 5/17+ -4/9+ -30/31+ 12/17+ -11/31< x/9 ≤ -3/7+ 7/15+ 4/-7+ 8/15+ 2/3
b) 1+ -1/60+ 19/120< x/36+ -1/60< 58/90+ 59/72+ -1/60
d) 1/5+ 2/30+ 121/165 ≤ x ≤ 1/2+ 156/72+ 1/3