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2017 AMC 12B Question 1

AMC12 · 2017 AMC 12B

Question 1

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?
  1. $1$
  2. $4$
  3. $5$
  4. $20$
  5. $25$