Answer: 66 children and 82 adults swam at the public pool that day.
Explanation:
Let x = the number of children Let y = the number of adults
We can create two equations to represent this problem:
x + y = 148 1.75x + 2.50y = 320.50
There are multiple ways to solve this algebraically, but I think the easiest is rearranging the first equation and substituting it into the other equation and solving.
x + y = 148 becomes x = 148 - y ^^^Note: the variable you arrange to solve for first doesn’t matter
Let’s plug this value for x into the second equation and solve.