Answer:
Will walked 12 miles
Explanation:
To easily achieve this problem just take 5 the amount of miles it took Will to walk to school and add it with 7 the amount of miles it took him the long way to walk home. This can be easily solved in 2 steps.
My Numerical work:
1) 7 + 5 = 12
2) 12
I Hope I Helped!
~KingJupiter