Translate the sentence into an inequality.

Question

The difference of twice a number and 3 is at least 18.

Answer 1

The difference of twice a number and 3 is at least 18.

Let a number be x

twice a number = 2x

⇒ The difference of 2x and 3 is at least 18.

The difference of 2x and 3 = 2x-3

⇒ 2x-3 is at least 18.

at least 18 = 18 or more = ≥18

⇒ 2x-3 ≥ 18