We are given expression:
.
Where, x is the number of containers number of strawberries.
And given expression represents how many strawberries each person received.
x is being multiplied with 9. So, the total number of strawberries in x container is 9x.
And 9x is being divided by 7.
That represents the total number of 9x strawberries are being divided in 7 students.
Therefore, the number 7 in the expression represent :The number of people the strawberries were split among