![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The expression is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f22f61e91074fe6503b2771e8f73243e.png\")
.
\
§ Start at zero.
\§ Move 12 units to the left.
\§ From there, move 9 units to the right.
\ ![\"\"](\"/userfiles/image/Library/Algebra1/number%20line%20pa_89%20pr_8.gif\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step2.JPG\")
Rewrite the expression.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8d1bf6c6c1875cf53eacb81bfacc2432.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8329953069f0d0547ab89e2ce9cc1bcb.png\")
(Product of two sames signs is positive)
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=1c201d5a71eb545a504d11b7d95a9e1c.png\")
(Add: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=00c2838e6c36d5da0e1442e13d4ef24a.png\")
)![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The solution is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2af6e83b0e9af64878f4e8cc8c73d3f5.png\")
. \ \