\
Write the expression for cost of books =
\
=
(Multiply:
)
\
=
(Add:
)
\
The cost of books is
.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4f5cdacb41268d6602a791fe8566bb54.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c03378e64c5db8c6e263478573551041.png\")
(Multiply: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d5635a36064e804413830f11c07c883c.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=29598f24f594c1c8c1c42e78bd611ef7.png\")
(Add: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6c3e653c2fe5c940978ac1f1bf8b2b86.png\")
)![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=29598f24f594c1c8c1c42e78bd611ef7.png\")
.