Answer:
15 pairs
Explanation:
total:$20
cat food: $8:50
two pair of socks: $1.50
$20 - $8.50= $11.50(the rest of the money)
the rest is divided by the price of the socks to obtain how may socks you can pay with $11.50.
$11.50÷$1.50≈ 7.6
Now you multiply 7.6 by two to get the exact amount of socks with the offer.
7.6×2≈15.2
15.2≈15
So with $11.50 you will buy 14 socks for 1.50 every two pairs and a pair for 0.75