Let P be the number of phones sold and A be the number of accessories sold.
The system of equations is:
P + A = total number of items sold
14P + 3.50A = total commission earned
Using the information given, we can write the equations:
P + A = total number of items sold
14P + 3.50A = 129.50
Since Abigail sold 7 more accessories than phones, we can also write the equation:
A = P + 7
Abigail works as a salesperson at an electronics store and sells phones and phone accessories. Abigail earns a $14 commission for each phone she sells and a $3.50 commission for each accessory she sells. On a given day, Abigail earned a total of $129.50 in commission and sold 7 more accessories than phones. She writes a system of equations that can be used to determine the number of phones sold and the number of accessories sold. She defines the variables that she will use to write the system.
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