Hello! Based off your question we can see that we are looking to find an inequality.
If your brother has saved a total of $2,000 for a vacation, and his airplane ticket costs him $637, he will only have $1,363 left to spend elsewhere on his vacation.
To write this in an inequality format, x will represent the total value that he can spend on vacation, seen here. [tex]x\leq $2,000 - $637[/tex]
