![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The expression is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4704ab4a627b6785661645521a9195c2.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f902868a7fdb5acba046d07318422af5.png\")
(Replace x with 7 and y with 3 in original expression)
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=43a3fab40c2b9e7251b4e781ceed77ae.png\")
(Rewrite the expression as division problem)
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step2.JPG\")
To simplify the expression follow the order of operations: (PEMDAS)
\1. Evaluate the expressions inside Brackets/Parenthesis (P).
\2. Evaluate Powers/Exponents (E).
\3. Multiply and/or Divide in order from left to right (MD).
\4. Add and/or Subtract in order from left to right (AS).
\A simple technique for remembering the order pf operations is turned into phrase
\“Please Excuse My Dear Aunty Sally”
\\
First evaluate the expression within the parenthesis.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5fc12f31b8ab60c2b1c82aafe2a0b0a5.png\")
(Multiply: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d7ee9b60a320fcf567adb1fae40264d6.png\")
)
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step3.JPG\")
Next operation is division.
\ ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f56833abdcb324673dc919ea5bd48b49.png\")
(Divide: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=1215997869b954c29c8fa82f829fc235.png\")
)
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The value of the expression is 21.