SOLUTION: A retail music shop sells old CD�s for $8.00 each and old cassettes for $3.00 apiece. On a recent sales day, they sold a total of 1200 CD�s and cassettes (combined) and took in $71

Question 830113: A retail music shop sells old CD�s for $8.00 each and old cassettes for $3.00 apiece. On a recent sales day, they sold a total of 1200 CD�s and cassettes (combined) and took in $7100 in revenues. How many CD�s were sold that day? What was the total dollar sales of cassettes alone?
I got 700 CD's at $8 = $5,600
and 500 Cassettes at $3 = $1,500
I just can't figure out the equation that would give me those answers
I tried x+y=1200 and 2x-y=2 but I can't figure how to fit in another equation with the total price of $7,100. Please help!!
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
---
x = CD's sold
y = Cassettes sold
---
x + y = 1200
8x + 3y = 7100
---
copy and paste the above linear system in standard form into this matrix-method solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
---
solution:
x = CD's sold = 700
y = Cassettes sold = 500
---
CD revenue = 8*700 = $5600
Casette revenue = 3*500 = $1500
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Solve systems of linear equations up to 6-equations 6-variables:
https://sooeet.com/math/system-of-linear-equations-solver.php
RELATED QUESTIONS
On the first day, Cindy sells 6 adult tickets and 5 children's tickets for a total of... (answered by MathLover1,ikleyn,josgarithmetic,greenestamps)

Patricia's school is selling tickets to the school play. On the first day of ticket... (answered by Theo,math_tutor2020,mananth)

roxy’s ice cream shop sells ice cream sandwiches for $2 and root beer floats for $3. on (answered by ikleyn,greenestamps)

In Tim's Music Shop, the sales of records, tape cartridges, and cassettes form the ratio... (answered by Edwin McCravy)

76 people attend a concert. Each adult ticket costs $4.00. Each child ticket costs $3.50. (answered by josgarithmetic,greenestamps)

A music shop sells used CDs for $10 and new CDs for $15. A customer spent $120 on 10 CDs. (answered by josgarithmetic)

=Yesterday, Manuel's electronics store sold several radios at $18.50 each and a few blank (answered by checkley75)

This Question is hard to understand please help???? An internet company sells CD's for (answered by Paul)

A concession stand sells pizza slices and lemonade. Each pizza slice costs $2.50 .... (answered by ikleyn)