The word difference indicates subtraction, symbol is .
The difference of and a number x is .
The expression is .
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.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2f80b95d21c74e5210c6f4f77282cb42.png\")
and a number x is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5dbaed200c299f2e819efafd0b3d927b.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
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.