168 children and 35 adults swam in the public pool
Let the number of children in the pool be x
Let the number of adult in the pool be y
If 203 people used the public swimming pool, then;
x + y = 203
Also, if the daily prices are $1.75 for children and $2.25 for adults with the receipts for admission totaled $372.75, then;
1.75x + 2.25y = 372.75
175x + 225y = 37275
7x + 9y = 1,491
Substitute equation 1 into 2
7(203-y) + 9y = 1,491
1421- 7y + 9y = 1491
2y = 70
y = 35
Since x = 203 - y
x = 203 - 35
x = 168
Hence 168 children and 35 adults swam in the public pool
Learn more on simultaneous equation here: https://brainly.com/question/16863577