Answer:
He can spend less than or equal to 1363
Explanation:
Let x be the amount he can spend for everything else excluding ticket
Ticket price = $637
So, Total amount spend = x+637
We are given that your brother has $2,000 saved for vacation.
So, He can spend 2000 or less than 2000 for vacation.
So, inequality becomes:




An inequality to find out how much he can spend for everything else is

Hence he can spend less than or equal to 1363 .