Answer: No. of street bear "Fourth Street " as name= 7848
No. of street bear  "Main ​Street" as name =7536
Step-by-step explanation:
Given : Two common names for streets are Fourth Street and Main ​Street, with 15, 384 streets bearing one of these names.
Let  x= No. of street bear name Fourth Street & y= No. of street bear name Main ​Street .
Then , [tex]x+y=15384------------(1)[/tex]
There are 312 more streets named Fourth Street than Main Street.
i.e.[tex]x-y=312-------------------(2)[/tex]
Adding (1) and (2), we get
[tex]2x=15696[/tex]
Divide both sides by 2 , we get
[tex]x=7848[/tex]
Put value of x=7848 in (1), we get
[tex]7848+y=15384\\\\\Rightarrow\ y=15384-7848=7536[/tex]
Hence, No. of street bear name Fourth Street = 7848
No. of street bear name Main ​Street =7536