Answer:
Each scholar have to sell 4 boxes in order to raise enough money to cover the team's travel expenses
Explanation:
Let x denotes number of boxes to be sold by each scholar to raise enough money to cover the team's travel expenses.
Number of scholars = 7
Total number of boxes
![=7x](https://img.qammunity.org/2021/formulas/mathematics/college/r5rsmqrc8ijskhela9opy2bt1b39jmfolk.png)
Total number of chocolate bars
![=(7x)(30)=210x](https://img.qammunity.org/2021/formulas/mathematics/high-school/84vmb4j21f3z7bav1q1d8ywunhsvle563b.png)
Price of 1 chocolate bar = $2
Price of
chocolate bars
![=210x(2)=\$420x](https://img.qammunity.org/2021/formulas/mathematics/high-school/76j46roufqsvb4e7q8exaqmywgtxdqnh60.png)
Also,
Total amount to be raised for travel expenses = $1680
So,
![1680=420x\\x=(1680)/(420)\\ x=4](https://img.qammunity.org/2021/formulas/mathematics/high-school/175hu0bjufdab2zqmkv33de6anwzfq3iok.png)
Therefore,
each scholar have to sell 4 boxes in order to raise enough money to cover the team's travel expenses