The answer is: 27 seats
Let's make the equations with the given information:
[tex]x=SmallVanSeats\\y=LargeVanSeats[/tex]
Then, if the larger van has five (5) more seats than the smaller van:
[tex]y-x=5[/tex]
So, if the smaller van makes two trips and the larger just makes one, transporting a maximum of 71 people:
[tex]y+2x=71[/tex]
By substituting equation 1 into equation 2, we have:
[tex](5+x)+2x=71\\3x=71-5\\3x=66\\x=\frac{66}{3}=22[/tex]
So, the smaller van has 22 seats, to find how many seats has the larger van we just need to substitute the number of seats of the smaller van into the first equation:
[tex]y-22=5\\y=22+5=27[/tex]
So, the larger van has 27 seats.
Have a nice day!