17.
n - 0.1 ≤ 1.4
n - 0.1 + 0.1 ≤ 1.4 + 0.1
n ≤ 1.5
18.
7 > z + 2/3
-z > 2/3 -7
-z > -6
z < 6
19.
22 ≥ c - 2.1
-c ≥ -2.1 - 22
-c ≥ -24.1
c ≤ 24.1
20.
13 ≥ 9 + b
-b ≥ 9 - 13
-b ≥ -4
b ≤ 4
21.
14 1/2 < b -1 1/4
-b < -1 1/4 - 14 1/2
-b < -15 3/4
b > 15 3/4
22.
t + 1/5 < 2 7/10
t < 2 7/10 - 1/5
t < 2 5/10
t < 2 1/2