Question

If the replacement set = {- 6,. - 3, 0, 3, 6, 9}; find the truth set of the following : 3x + 7 < 1

Answer 1

3x + 7 ≤ 1

⇒ 3x + 7 – 7 ≤ 1 – 7 (Subtracting 7)

⇒ 3x ≤ – 6

⇒ x ≤ – 2

Required Answer = {-6, -3}