Question

If the replacement set is the set of natural numbers, solve:   4x + 1 ≥ 17

Answer 1

4x + 1 ≥ 17

⇒ 4x + 1 - 1 ≥ 17 - 1  (Subtracting)

⇒ 4x ≥ 16

⇒ `"4x"/4` ≥ `16/4` (Dividing by 4)

⇒ x ≥ 4

Required answer = {4, 5, 6, ...}