Answer: The number of small vehicles were washed 60 in total.
Explanation:
Let the number of small vehicles be 'x'.
Let the number of large vehicles be 'y'.
Cost charged for small vehicle = $5.00
Cost charged for larger vehicle = $10.00
Total amount collected at a car wash fundraiser = $800
According to question,

Since the number of larger vehicles washed = 50
That means, y = 50.
So, we put the value of y in the above equation, to get the number of small vehicles were washed in total.

Hence, the number of small vehicles were washed 60 in total.