Question

Jenny bought some stamps. She spent one-third of the original amount plus $5 in the first store, one-third of what was left plus $5 in the second store, and one-fifth of what was left in the third store, leaving her with $20. How much money did she start with?

Answer 1

Jenny started with $115.

Step-by-step explanation:

To solve this problem, we need to work backwards. Let's start with the amount Jenny had at the end, which is $20. Since she spent one-fifth of what was left in the third store, we can find the amount she had before that by multiplying $20 by 5. This gives us $100. Next, we can find the amount she had before the second store by adding $5 and one-third of what was left. By multiplying the amount by 3, we get $105. Finally, we can find the amount she started with by adding $5 and one-third of what was left. By multiplying the amount by 3, we get $115. Therefore, Jenny started with $115.