Answer:
Total stamps required on package is:
2S+3
Step-by-step explanation:
Jack already has S stamps on the package.
The postal worker tells him that he's going to have to double the number of stamps on the stamps on the package and then add 3 more.
i.e. double of stamps on package is: 2S
and three more the double equals:
2S+3
Hence, The total stamps required are:
2S+3