To do this, nice it to add 3 and 5, then divide 72 by the result of sum 3 and 5. Finally multiply it by 3 and by 5 to get the result.
Lets do this
3+5=8
72:8=9 - number of rolls in 1 "unit"
9*3=27 - first group
9*5=45 - second group
A+s=294
s=2a
Use substitution
a+2a=294
3a=294
a=98
Final answer: 98 adult tickets
8x - 88 = 2x - 34
6x = 54
x = 9
Given:
The figures cylinder, cube, cone, and pyramid.
To find:
The formula of volume for the given figures.
Solution:
Volume of a cylinder is:

Where r is the radius and h is the height.
Volume of a cube is:

Where a is side length of cube.
It is also written as:

Where l is length, w is width, h is height and
.
Volume of a cone is:

Where r is the radius and h is the height.
Volume of a pyramid is:

Where B is the base area and h is the height.
Therefore the table of formulae is shown below:
Figure Volume formula
Cylinder 
Cube 
Cone 
Pyramid 