A store charges the same amount for each pair of socks. A customer can buy 3 pairs of socks for $7.80. Henry bought 4 pairs of s
ocks when they were each on sale for 10% off. He also bought a pair of shoelaces. Henry spent a total of $11.58. How much was the pair of shoelaces? $1.13
$2.22
$2.34
$2.60
Since 3=30/10, (30+1)/10=31/10. 31s/10=(30+1)/5 ( we get 30 because 5*6=30) = 31/5. Multiplying both sides by 10, we get 31s=62 (since 5 is a factor of 10, we can do 10/5 =2 and multiply 2 by 31). Dividing both sides by 31, we get s =2