Question

Jarek buys jerseys for his team online. He pays a constant shipping price plus a special rate for each jersey. During the spring season Jarek paid $151 for 24 jerseys. In the summer season he paid $79 for 12 jerseys. What is the special rate Jarek pays for each jersey and how much does he pay for shipping?

Answer 1

1)24r+s=$151
2)12r+s=$79
1)-2), we get
(24r+s)-(12r+s)=$151-$79
12r=$72
r=$72/12=$6

Substitute r the value into equation 1)
s+24*$6=$151
s=$151-$144
s=$7

So he pays $6 for the rate, $7 for the shipping.