The functions are .
To find
(Substitute g(x) = x + 7)
(Add: 3 + 7 = 10)
(Substitute f(x) = 3x)
(Multiply: )
The value of .
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=854b1ffeecca74f87da60af366e9ac8d.png\")
. ![\"f](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=31debc374eb0f448c7ff1897c90128af.png\")
![\"f](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=d6c28cb60e85e3bfe90b71cbefba90bf.png\")
(Substitute g(x) = x + 7)![\"equal](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=b5bc2f9af83301fa40dcc9d501edbc5c.png\")
(Add: 3 + 7 = 10)![\"equal](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=30ba2d0507b7b05d10736d7bf8020353.png\")
(Substitute f(x) = 3x)![\"equal](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=c6c2386ff77da54554bfd2d000cffb6a.png\")
(Multiply: ![\"3](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=9e3a9c80319d1b33b274ff7750815274.png\")
)![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
.