Answer: The difference between Bella's and Andy's number is 1129
Step-by-step explanation:
Let x represent Bella's number
Let y represent Aki's number
Let z represent Andy's number
Bella's number is 875 more than akis number. It means that
x = y + 875
aki subtracts 499 from his number and now aki is 245 less than Andys number. It means that
y - 499 = z - 245
z = y - 499 + 245 = y - 254
z = y - 254
The difference between Bella's and Andy's number is x - z. It becomes
y + 875 - (y - 254)
= y + 875 - y + 254
= y - y + 875 + 254
= 1129
