If Bill can buy 3 pairs of jeans and 2 shirts for $69 or 2 pairs of jeans and 3 shirts for $86, how much does one shirt cost? Choose the most appropriate option.
A) $10 B) $12 C) $13.20 D) $15 E) $24
3J + 2S = 69   2J + 3S = 86   ----------------   5J + 5S = 155 ----(divide by 5)---&gt; J + S = 31   3J + 2S = J + 2(J + S) = J + 62 = 69 ---&gt; J = 7   3*7 + 2S = 69   21 + 2S = 69   2S = 48   S = 24   Answer: $24
<result>E</result>
If Bill can buy 3 pairs of jeans and 2 shirts for $69 or 2 pairs of jeans and 3 shirts for $86, how much does one shirt cost?