Answer :
An inequality is not necessary. It is simple subtraction. 2000 - 637 = 1363 Based on the equation, the brother has $1363 to spend on everything else.
The maximum amount of money that he can spend on everything else is $1363.
Let x represent the amount of money he can spend on everything else.
Since the total amount of money available is $2000 and the cost of the airplane ticket is $637, hence:
x + 637 ≤ 2000
x ≤ 1363
Therefore the maximum amount of money that he can spend on everything else is $1363.
Find out more at: https://brainly.com/question/15137133