Suppose that in one week, your company takes in $2,220 in sales at one of its cell phone stores. The price breakdown per phone is as follows:
Cell phone model A4: $35
Smartphone Z20: $50
Suppose that a total of 51 phones were sold.
a.Set up the system of equations that needs to be solved to determine how many of each type of phone were sold. Give a clear definition of the variables in the system.
b.Solve the system of equations, showing clearly how the solution was determined, and state the results clearly in light of the real-world situation.
c.Verify your results of the 2 linear e

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