We bought a total of 80 books at the store. Math books cost $4 and history books cost $5. The total price was $368. How many math books did we buy? Choose the correct choice from the following: A) 28 B) 32 C) 36 D) 40 E) 44
M + H = 80   H = 80 - M   4M + 5H = 368   4M + 5*(80 - M) = 368   M = 32   The answer is 32.
<result>B</result>
We bought a total of 80 books at the store. Math books cost $4 and history books cost $5. The total price was $368. How many math books did we buy?