Answer:
The distance between London and Paris is 213 miles, and the distance between Dublin and London is 291 miles.
Explanation:
Let's assign variables to the unknown distances:
Distance from London to Paris = x
Distance from Dublin to London = x + 78
According to the given information, the distance between Dublin and Paris, including the stop in London, is 504 miles. Using these values, we can set up the equation:
Distance from Dublin to London + Distance from London to Paris = 504
(x + 78) + x = 504
Combining like terms:
2x + 78 = 504
Subtracting 78 from both sides:
2x = 426
Dividing both sides by 2:
x = 213
Therefore, the distance between London and Paris is 213 miles, and the distance between Dublin and London is 213 + 78 = 291 miles.