Problema Solution
Model the real life problem with a system of linear equations. Then solve the system using the Substitution Method or Linear Combinations.
A vendor at the swap meet sells CDs for $3 and DVDs for $5. You buy 12 discs and spend a total of $50. Ho many of each type of disc did you buy?
Hint to start: Let x = the amount of CDs you bought. Let y = the amount of DVDs you bought
Answer provided by our tutors
3x+5y=50
x+y=12
so 60-5x=50
5x=10
so x=2
so y=10
so cd =2 and dvd =10