Answer:

A bottle water costs $2.08
Step-by-step explanation:
Given
Represent the hamburger with H
Represent the bottles of water with B

Solving (a): Represent as an equation
1 hamburger = 3.26
3 bottles of water = 3 * B
Total = 9.50
The system is represented as thus:
1 hamburger + 3 bottles of water = Total
Substitute values


Solving (b): The cost of bottle water

Make 3B the subject


Divide both sides by 3



A bottle water costs $2.08