Answer: There are 7,677 streets named as " First Street" and 7, 189 streets named as "Main Street" .
Step-by-step explanation:
Let x be the number of streets named as First Street .
y be the number of streets named as Main Street.
AS per the given information, we have the following system of equations :
[tex]x+y=14866-------------(1)\\\\x=488+y-------------(2)[/tex]
Substitute the value of x from (2) in (1) , we get
[tex]488+y+y=14866\\\\ 2y =14866- 488\\\\ 2y=14378\\\\ y=7189[/tex]
Put value of y in (2), we get
[tex]x=488+7189=7677[/tex]
Hence , there are 7,677 streets named as " First Street" and 7, 189 streets named as "Main Street" .