Problem:
Kymbrea's comic book collection currently has 30 comic books in it, and she is adding to her collection at the rate of 2 comic books per month. LaShawn's collection currently has 10 comic books in it, and he is adding to his collection at the rate of 6 comic books per month. After how many months will LaShawn's collection have twice as many comic books as Kymbrea's?
Answer Choices:
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Solution:
After months, Kymbrea's collection will have comic books and LaShawn's collection will have comic books. Solving yields , so LaShawn's collection will have twice as many comic books as Kymbrea's after months.
The problems on this page are the property of the MAA's American Mathematics Competitions