Final answer:
Kelsey and Kris will have the same amount of money in the bank after 0 weeks.
Step-by-step explanation:
To find out after how many weeks Kelsey and Kris will have the same amount of money in the bank, we need to set up an equation.
- Let's assume the number of weeks required is 'x'.
- Kelsey withdraws $25 per week, so the amount of money Kelsey will have after 'x' weeks is $25 * 'x'.
- Kris deposits $15 of his allowance and $20 earned from dog walking into his account each week, so the amount of money Kris will have after 'x' weeks is ($15 + $20) * 'x'.
To find the number of weeks where they have the same amount of money, we can set up the equation:
$25x = ($15 + $20)x
Simplifying the equation:
$25x = $35x
Dividing both sides of the equation by $10:
x = 0
Thus, they will have the same amount of money in the bank after 0 weeks.