Answer:
3 one-hour tour tickets and 5 two-hour tour tickets
Explanations:
Let the number of one-hour tour tickets be "x"
Let the number of two-hour tour tickets be "y"
If your group bought a total of 8 tickets, then;
x + y = 8
x = 8 - y............................... 1
If tickets for one hour are $25 each and tickets for a two-hour tour are $48 each with a total amount of $315 spent, then;
25x + 48y = 315 .......................2
Substitute equation 1 into 2 to have:
25(8 - y) + 48y = 315
200 - 25y + 48y = 315
200 + 23y = 315
23y = 315 - 200
23y = 115
y = 115/23
y = 5
Substitute y = 5 into equation 1 to have:
x = 8 - y
x = 8 - 5
x = 3
This shows that 3 one-hour tour tickets and 5 two-hour tour tickets were bought.