June has $90 in the bank and adds $5 each week. Her friend mae has $60 in the bank and is saving $15 each week. How many weeks until they have the same amoint of money?

Answer 1

Let x = number of weeks.

June: $90 + $5x

Mae: $60 + $15x

When equal:

90 + 5x = 60 + 15x

30 = 10x

x = 3

Check:

In 3 weeks, June has $90 + $5*3 = $105

In 3 weeks, May has $60 + $15*3 = $105

Ans: 3 weeks