Connor runs 2 mi more each day than David. The sum of the distances they run each week is 56 mi. How

Connor runs 2 mi more each day than David. The sum of the distances they run each week is 56 mi. How far does David run each day?

Let Connor's distance be c
Let David's distance be d

We're given two equations:

1. c = d + 2
2. 7(c + d) = 56

Simplifying equation 2 by dividing each side by 7, we get:

1. c = d + 2
2. c + d = 8

Substitute equation (1) into equation (2) for c
d + 2 + d = 8

To solve for d, we type this equation into our calculation engine and we get:
d = 3