Answer:
14 packs per hour
Step-by-step explanation:
The store sold 57 - 15 = 42 packs of toilet paper in 3 hours.
42 packs in 3 hours = 42/3 = 14 packs per hour
Let's say, the number is x.
2x + 15 ≤ (-7 - x )
2x + x ≤ -7 - 15
3x ≤ -23
x ≤ -23 / 3
The answer to the question is <u><em>9</em></u>
