Step-by-step explanation:
Assume that the additional miles that make the charge for total miles the same at each company is x (miles)
The charge of total miles by Metro taxi is: 3 + 2.5x ($)
The charge of total miles by City taxi is: 5 + 2.25x ($)
As the charge for the total is the same at each company, so that we have the equation as following: 3 +2.5x = 5 + 2.25x
=> 2.5x - 2.25x = 5-3
=> 0.25x = 2
=> x = 2/0.25 = 8 (miles)
=> The total miles are: 8 + 1 = 9 miles