Joey has a collection of baseball cards that he has separated into two different value categories. His common cards are worth $0.75 each and his premium cards are worth $2.00 each. Together, Joey’s entire baseball card collection of 88 cards is worth $106.00.

How many cards in Joey’s collection are worth $0.75?

Question

Joey has a collection of baseball cards that he has separated into two different value categories. His common cards are worth $0.75 each and his premium cards are worth $2.00 each. Together, Joey’s entire baseball card collection of 88 cards is worth $106.00.  

How many cards in Joey’s collection are worth $0.75?

anonymous · Answer

Let c = the number of common cards
Let p = the number of premium cards
Now we can write 2 different equations involving c and p.
Can you write one of them using the fact that there are 88 total cards in his collection? That's probably the easier of the 2 equations