SOLUTION: there are 12 more history books than math books in the library, if there are 122 sience and math book how many math books are there in the library.

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Question 232900: there are 12 more history books than math books in the library, if there are 122 sience and math book how many math books are there in the library.
Answer by checkley77(12569) About Me  (Show Source):
You can put this solution on YOUR website!
(12+M)+M=122
12+2M=122
2M=122-12
M=110/2
M=55 NUMBER OF MATH BOOKS.
PROOF:
12+55+55=122
122=122