document.write( "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. \n" ); document.write( "
Algebra.Com's Answer #172009 by checkley77(12844)\"\" \"About 
You can put this solution on YOUR website!
(12+M)+M=122
\n" ); document.write( "12+2M=122
\n" ); document.write( "2M=122-12
\n" ); document.write( "M=110/2
\n" ); document.write( "M=55 NUMBER OF MATH BOOKS.
\n" ); document.write( "PROOF:
\n" ); document.write( "12+55+55=122
\n" ); document.write( "122=122
\n" ); document.write( "
\n" );