[A+7= 28] is the correct equation I believe, though I may be wrong.
Answer:
60 miles
Step-by-step explanation:
let d = distance to the lake
Using: time = distance ÷ speed
Create expressions for the time it takes for each journey:
Drive: 
Walk: 
If total time = 17 hours






Therefore she walked 60 miles
The correct answer is 427
I hope you can understand what i wrote