Răspuns :
(a + 2)/6 < 1
a + 2 < 6
a < 6 - 2
a < 4
5/(2a - 1) = 1
5 = 2a - 1
5 + 1 = 2a
2a = 6
a = 3
10/2a = 1
10 = 2a
a = 5
(3a + 1)/9 ≤ 1
3a + 1 ≤ 9
3a ≤ 8
a ≤ 8/3
(a + 2)/6 < 1
a + 2 < 6
a < 6 - 2
a < 4
5/(2a - 1) = 1
5 = 2a - 1
5 + 1 = 2a
2a = 6
a = 3
10/2a = 1
10 = 2a
a = 5
(3a + 1)/9 ≤ 1
3a + 1 ≤ 9
3a ≤ 8
a ≤ 8/3