Question

Three less than 5 times a number is less than or equal to 12 . If the number is a whole number, what could the number be?

Answer 1

Answer:

B. The number could be 1, 2 or 3.

Explanation:

Let the number = x

• 5 times the number = 5x

,

• Three less than 5 times a number = 5x-3

If the expression above is less than or equal to 12, we have:

$5x-3\le12$

We solve for x.

$\begin{gathered} 5x\le12+3 \\ 5x\le15 \\ x\le\frac{15}{5} \\ x\le3 \end{gathered}$

Since the number is less than or equal to three, the number could be 1, 2 or 3.