Arturo O. answered 01/04/20
Experienced Physics Teacher for Physics Tutoring
This is not impossible at all. It is a matter of setting it up properly.
x = number of child tickets sold at 5.60 each
3x = number of adult tickets sold at 9.10 each
5.60x + (9.10)(3x) = 1118.60
Now solve for x and finish from here. You should get
x = 34