Given equation is \ \
Since the term rt has two variables, the equation cannot be written in the form of
A r + Bt = C. Therefore it is not a linear equation.
Equation is not a linear equation.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9b017e76c0232204c1912e77f5232405.png\")
\ \
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")