A music store is selling compact disks for $11.50 and $7.50. You buy
12 disks and spend a total of $110. How many compact disks that cost
$11.50 did you buy?

Question

A music store is selling compact disks for $11.50 and $7.50. You buy
    12 disks and spend a total of $110.  How many compact disks that cost
    $11.50 did you buy?

anonymous · Answer

lets say the 11.50 disks is x
lets say the 7.50 disks is y

anonymous · Answer

If we add them together we get 12 
if we also add the total cost we get 110
This is two equations

x+y=12
11.50x+7.50y=110

anonymous · Answer

Solve the system of equation for x

anonymous · Answer

i got 5 :( its not right but thats what i keep getting

anonymous · Answer

If you solve for the system of equations you should be able to get the answer. Can you show me your work?

anonymous · Answer

You got it right

anonymous · Answer

did i?

anonymous · Answer

thank you