document.write( "Question 1185937: The mass of 4 similar music books and 6 biology books is 7.2kg. The mass of 2 such music books is 3.4kg. Find the total mass of 2 music books and 6 Biology books \n" ); document.write( "
Algebra.Com's Answer #849387 by ikleyn(52879)\"\" \"About 
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\n" ); document.write( "The mass of 4 similar music books and 6 biology books is 7.2kg. The mass of 2 such music books is 3.4kg.
\n" ); document.write( "Find the total mass of 2 music books and 6 Biology books
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document.write( "An attentive reader should notice that the targeted collection of books \r\n" );
document.write( "(2 music books and 6 Biology books) can be obtained from the original set of books \r\n" );
document.write( "(4 music books and 6 Biology books) by removing 2 music books.\r\n" );
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document.write( "Therefore, we subtract the mass of 2 music books (3.4 kg) from the mass \r\n" );
document.write( "of the original set of books (7.2 kg), and we obtain the answer immediately\r\n" );
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document.write( "    7.2 - 3.4 = 3.8 kilograms.\r\n" );
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document.write( "ANSWER.  The total mass of 2 music books and 6 Biology books is 3.8 kilograms.\r\n" );
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