Answer:
Number of children= 346
Number of adults= 345
Explanation:
We can set up a system of equations to solve for the number of children and adults.
x= number of children
y= number of adults
We know that the total number of people at the swimming pool is 691, which is comprised of both children and adults. We can write this equation as...
x+y=691
We also know that children pay 1.75 dollars and adults pay 2 dollars, with a total of 1295.50 dollars.
1.75x+2y=1295.50
We can now solve the system with elimination by multiplying the first equation by negative 2.
x+y=691 -> -2x-2y= -1382
-2x-2y= -1382
1.75x+2y=1295.50
-0.25x=-86.5
x= 346
Now that we found the number of children, we can solve for the number of adults.
x+y=691
346+y=691
y= 345