![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The equation is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8bfe950565634ca998f52238c587f8f4.png\")
, where c is the total cost in dollars and n is the number of roller coasters.
Substitute the value of ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e0203e2fab72e07f8ca7d2ec2198b8b1.png\")
in the original equation.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=00fa34059afd3b803b1b9cafb30679ff.png\")
Subtract 15 from each side.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ba02d85caea82dc1a554d8f8a9066442.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f3ec112e6b4b73ba5b8f9685aa5ff4a3.png\")
Divide each side by 3.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c7b18cf649e88e0efab7cbed664f54d1.png\")
Cancel common terms.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4dc6d573082825f44491c014eac5920f.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The option F is correct answer.