Jan has $130. If she saves $25 per week, in how many weeks will she have $600

Answer 1

600 = 25w + 130 (she starts with 130, and is trying to save 25 dollars a week until she reaches $600)

Subtract 130 from both sides:

600 - 130 = 25w + 130 - 130

470 = 25d

Divide by 25:

470 / 25 = 25w / 25

18.8 = w. May be rounded up to 19 weeks if she is saving in lumps sums per week instead of a gradual constant rate.