Question

3
sarah has $22 for lunch.
this is $5 more than mark spent (x).
how much did mark spend on lunch?
$x=17$

Explanation:

Step1: Set up the equation

Sarah's amount equals Mark's amount plus 5:
$$22 = x + 5$$

Step2: Solve for x

Subtract 5 from both sides:
$$x = 22 - 5$$

Answer:

$\$17$