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

Total number of chocolate bars

Price of 1 chocolate bar = $2
Price of
chocolate bars

Also,
Total amount to be raised for travel expenses = $1680
So,

Therefore,
each scholar have to sell 4 boxes in order to raise enough money to cover the team's travel expenses