Question

Heather has $500 in her savings account. she withdraws $20 per week for gas. write an equation heather can use to see how many weeks it will take her to have a balance of $220.

Answer 1

220 = -20w + 500 <== ur equation
220 - 500 = -20w
- 280 = -20w
-280/-20 = w
14 = w.....it would take 14 weeks