![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
\
The equation is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6ba365075f713c04bbb83f5d905eaf7f.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=bc115f91ad2f2d64c649e25ca66de5d3.png\")
(Substitute r = 4)
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ef539e72fc0a9c5a4c6a4fde645f6b6d.png\")
(Multiply:![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f27070b8c22f86931cd12a6cdbdd3a1a.png\")
)
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f59430ed11fb770bcab5b7b973b7bff8.png\")
(Subtract:![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5511823c668416d639a1f9db6f973a42.png\")
)
![\"\"](\"/userfiles/image/Library/inequalitypa55_p8.gif\")
(Absolute value of ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=90bc1cba63ac277aecaeb5b6101d1160.png\")
)
Compare the values the equation is true.
\![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
The given number is a solution to the equation.
\\