Answer:
430
Step-by-step explanation:
Given :-
And we need to find out the CP .So ,
Let :-
According to the Question :-
[tex]:\implies[/tex] 460 = x + y ( Profit)
[tex]:\implies[/tex] 400 = x - y ( Loss)
Adding both :-
[tex]:\implies[/tex] 460 + 400 = x + y + x - y
[tex]:\implies[/tex] 860 = 2x
[tex]:\implies[/tex] x = 860/2
[tex]:\implies[/tex] x = 430
Hence the Cost price of the watch is 430 .