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

Question

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

anonymous · Answer

X + Y = 51....1
35X + 50Y = 2200.......2
where X is Cell phone A4 and Y is Z20
Dividing by 5 
7X + 10Y = 440....3
7X + 7Y  = 357...1*3
-       -        -
3Y=83
Y=27.67 (Considering it cant be in decimal)
X=51-28=23