Start by illustrating the distance from Springfield to Lakewood City and from Springfield to Bettsville.
Practice makes perfect
We know that the distance from Springfield to Lakewood is equal to the distance from Springfield to Bettsville. Note that we have no idea how large this distance is, so the only thing we can show is that they are equal segments.
Next, we know that Janisburg is 50 miles farther from Springfield then Bettsville. We also know that Moon Valley is 50 miles farther from Springfield than Lakewood City.
Using the given information, we have drawn an example diagram.
