Question 1026402
Assign a variable.
p students DID go on the trip to the museum.


That means p+25 students planned to go when the planned trip was for the swimming pool.  Either way, the cost for both was 900 dollars each.


That "each", meaning "EACH TRIP".


What were the PRICES for one student?


Swimming pool trip,  {{{900/(p+25)}}}.
Museum trip, {{{900/p}}}.


...
There is a little bit more and then solving an equation.