Answer:
10 weeks
Explanation:
12 * 3 = $36 At this point of 3 weeks you will be out of debt.
$12 * 7 weeks = $84 At this point you will be a dollar short, but you had a dollar left over after 3 weeks. This would put you at a total of $85.
So, it would take 3 weeks to get out of debt and 7 to get up to $85.
3 + 7 = 10
A= 10 weeks
Hope this helps! :)