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,
![5x+10y=\$800\\\\x+2y=\$160](https://img.qammunity.org/2020/formulas/mathematics/middle-school/s7d01xwh43u5bbikt9gxtyo21v29p2atxq.png)
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.
![x+2y=160\\\\x+2* 50=160\\\\x+100=160\\\\x=160-100\\\\x=60](https://img.qammunity.org/2020/formulas/mathematics/middle-school/l97nhnua6eqee3b0w1ielt095dt0sg7xpz.png)
Hence, the number of small vehicles were washed 60 in total.