Two numbers have a sum of 1,212 and a difference of 518. Which system of equations could we use to solve this problem?
Let x and y be the two numbers. Then we have:
x + y = 1212 (sum of the two numbers is 1,212)
x - y = 518 (difference of the two numbers is 518)
This gives us the system of equations:
{
x + y = 1212
x - y = 518
}