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Mackenzie works as a salesperson at an electronics store and sells phones and phone accessories. Mackenzie earns a $10 commission for every phone she sells and a $4 commission for every accessory she sells. On a given day, Mackenzie made a total of $126 in commission and sold 7 more accessories than phones. Write a system of equations that could be used to determine the number of phones sold and the number of accessories sold. Define the variables that you use to write the system.

 Mar 5, 2021
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p = phones

a = accessory =   7+p 

 

10 p   + 4 (7+p)    = 126

p = 7      then a = 14

 Mar 5, 2021

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