Answer: Cost 6 pairs of socks = $18 and the cost of one pair of socks = $3.
Explanation:
Given : Deb bought a pair of shoes for $60 and 6 pairs of socks.
The total before tax was $78.
Now, after subtracting cost of shoes from the total price paid , we get the cost of 6 pairs of socks.
Cost of 6 pairs of socks = $78-$60 = $18
Then , the cost of 1 pair =

Therefore, the cost of one pair of socks = $3.