![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The equation is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a74d713e079e65870a3421db08fea37e.png\")
.
Solve by algebraically.
\Apply subtraction property of equality: Subtract 21 from each side.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ff4cb68c59e129876a10f87842708a30.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3c37f3e4601ad817a4815b40d24f835f.png\")
(Simplify)
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3610d1f883474d57d914b27d85ad2bac.png\")
(Subtract 3x from each side)
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=79d121dbc3e5b283f48d509e1d11d7c2.png\")
(Simplify)
The related function is f(x) = ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=04335813473a1977be7c5bbc11aecd74.png\")
.
The root of a linear equation is the value of x, when f(x) = 0.
\Since f(x) is always equal to ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=04335813473a1977be7c5bbc11aecd74.png\")
, this equation has no solution.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The root of the equation ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a74d713e079e65870a3421db08fea37e.png\")
has no solution.