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Algebraically determine the unit cost for both a medium popcorn and a small drink.

 

 Mar 9, 2021
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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'

 Mar 9, 2021
edited by ElectricPavlov  Mar 9, 2021

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