To determine how many more cases of water Mr. Brown needs to buy, we can break down the information given:
- Mr. Brown already has 17 bottles.
- He needs a total of 350 bottles.
- Bottles are sold in cases of 24.
First, we need to find out how many more bottles he needs:
\[ \text{Bottles needed} = \text{Total bottles needed} - \text{Bottles already available} \] \[ \text{Bottles needed} = 350 - 17 = 333 \]
Now, to find out how many cases he needs to buy, we can use the formula:
\[ \text{Cases needed} = \frac{\text{Bottles needed}}{\text{Bottles per case}} \] Where the bottles per case is 24. Therefore, the equation for cases needed is:
\[ \text{Cases needed} = \frac{333}{24} \]
To summarize, the calculations show that Mr. Brown needs an equation to express how many more cases of water he needs:
\[ \text{Cases needed} = \frac{350 - 17}{24} \]
This equation effectively shows how to calculate the number of additional cases he needs. If you want to express the need in terms of how many more cases he has to purchase (instead of dividing), it can be represented simply as:
\[ \text{Cases needed} = \left(\frac{333}{24}\right) \text{ or } \frac{350 - 17}{24} \]