document.write( "Question 611945: a shelf can hold at most 20 math books and 6 biology books, or 15 math books and 16 biology books. If the shelf is to hold math books only, how many books can it hold? \n" ); document.write( "
Algebra.Com's Answer #385203 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
a shelf can hold at most 20 math books and 6 biology books, or 15 math books and 16 biology books. If the shelf is to hold math books only, how many books can it hold?
\n" ); document.write( "----
\n" ); document.write( "20m + 6b = 15m+16b
\n" ); document.write( "5m = 10b
\n" ); document.write( "Each math book occupies the space of 1 biology book.
\n" ); document.write( "----
\n" ); document.write( "So 16 biology books = 8 math books.
\n" ); document.write( "---
\n" ); document.write( "The shelf can hold 15m + 16b = 15m+8m = 23 math books.
\n" ); document.write( "==================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "=================
\n" ); document.write( "
\n" ); document.write( "
\n" );