Question

Carly had $6.80 in her piggy bank and planned on saving $4.20 a week. Her sister had $11.20 in her piggy bank and had plans on saving $3.10 a week. How many weeks will it take for Carly and Casey to have the same amount of money in their piggy banks?

Answer 1

Answer: 4 weeks

Explanation:

Let's start by setting up an equation to represent the situation:

6.8 + 4.2w = 11.2 + 3.1w

where w is the number of weeks it takes for Carly and Casey to have the same amount of money in their piggy banks.

Now we can solve for w:

6.8 + 4.2w = 11.2 + 3.1w

1.1w = 4.4

w = 4

Therefore, it will take 4 weeks for Carly and Casey to have the same amount of money in their piggy banks.