On the first day of the month, Jessica had $900 in her savings account and started spending $10 a week. Her friend Karina had $500 and started saving $15 a week. After how many weeks will the friends have the same amount?

Answer 1

you want w when

900+10w = 500+15w

Answer 2

let the number of weeks be w

when is 900 - 10w = 500 + 15w
solve for w

Answer 3

Oops. I misread the problem.