To solve the problem, we can set up an equation based on the information provided.
We know that:
- The charge for washing small vehicles (x) is $5.
- The charge for washing large vehicles (y) is $10.
- The total amount collected is $1000.
- The soccer team washed 75 large vehicles (y = 75).
Now, we can write the equation for the total amount collected:
\[ 5x + 10y = 1000 \]
Since \( y = 75 \), we can substitute \( y \) into the equation:
\[ 5x + 10(75) = 1000 \]
Calculating \( 10(75) \):
\[ 10(75) = 750 \]
Now, we can substitute this value back into the equation:
\[ 5x + 750 = 1000 \]
To isolate \( x \), we will subtract 750 from both sides:
\[ 5x = 1000 - 750 \] \[ 5x = 250 \]
Now, divide both sides by 5:
\[ x = \frac{250}{5} \] \[ x = 50 \]
So, the soccer team had to wash 50 small vehicles to meet their $1000 total.