joenotsoexotic837
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i need help.Please answer soon
A resale store is having a sale on DVDs and CDs. DVDs cost $7 and CDs cost $4. On one day, the store made $211 from DVD and CD sales and sold a total of 40 items.

Write a system of equations, then solve to find how many DVDs and CDs were sold.

*Show both the equations and the solution.

Respuesta :

Answer:

17 DVD 23CDs

Step-by-step explanation:

x=DVD y=CD (makes it easier for me to write this)

7x+4y=211 x+y=40

x+y=40

-x

y=40-x

7x+4(40-x)=211

7x+160-4x

3x+160=211

-160

3x=51

Divide by 3

51/3=17

17=x

17+y=40

-17

y=23

hope this helps :)

 

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