When you write the equation as , the equation is called a literal equation because the coefficients and constants have been replaced by letters.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=237a3167e17c812d3de23061698d8114.png\")
as ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=97a7622fb48c6039fef63c95393f01b0.png\")
, the equation ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=97a7622fb48c6039fef63c95393f01b0.png\")
is called a literal equation because the coefficients and constants have been replaced by letters.