Algebraically determine the unit cost for both a medium popcorn and a small drink.
Given p + 3d = 14.75
2p + 5d = 26 Muliply the top equation by -2 to get:
-2p -6d = -29.50 now add the two bottom equations
- d = - 3.50
d = 3.50 use this value of 'd' in one of the equations to calculate 'p'