x + y = 7 --- (1)
x - y = 3 --- (2)
Adding (1) and (2) together, we have:
(x + y) + (x - y) = 7 + 3
2x = 10
x = 10 / 2
x = 5
Subtracting (2) from (1), we have:
(x + y) - (x - y) = 7 - 3
x + y - x + y = 4
2y = 4
y = 4 / 2
y = 2
Hence, we have x = 5 and y = 2