document.write( "Question 476105: The branch of mathematics that uses letters, called variables, in place of numerals. \n" ); document.write( "
Algebra.Com's Answer #326520 by richard1234(7193)\"\" \"About 
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You first learn this in an elementary algebra course, but using variables instead of numbers is used in all fields of mathematics. \n" ); document.write( "
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