Kuri spent a total of $68 on trading cards. his collection contains two types of cards. a pack of trading card a $4 and a pack of trading card b cost $7. how many packs of each trading card were purchased if the total number of packs is 11?

Kuri purchased 3 packs of trading card A, and 8 packs of trading card B.

Step-by-step explanation:

1. First name the variables:

a = number of packs of trading card A

b = number of pack of trading card B

2. As a pack of trading card A costs $4, a pack of trading card b costs $7 and As Kuri spent a total of %68 on trading cards, the first equation is:

3. As Kuri purchased a total number of 11 packs, the second equation is:

4. Solve Eq.2 for a:

5. Replace Eq.3 in Eq.1 and solve por b:

6. Replace the value of b in Eq.3:

Therefore Kuri purchased 3 packs of trading card A, and 8 packs of trading card B.

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.