Question

Shalina uses the expression 3x to determine the cost of x notebooks. What is the cost of 24 notebooks?

$8
$27
$62
$72

Answer 1

$72

Explanation:

Let's use substitution to identify the cost of 24 notebooks.

The equation is represented as:

`3x = ?`

Substitute 24 into x:

`3(24) = ?`

Solve:

`72`