The statement is “”.
(Apply commutative property of addition: a + b = b + a)
(Apply associative property of addition: )
(Add: 5 + 7 = 12)
The simplified expression is .
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”.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4ff5361b06d35c026018be302051562c.png\")
(Apply commutative property of addition: a + b = b + a)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b808f8ec78ea798ef36647568c1259ef.png\")
(Apply associative property of addition: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=63b30614ae855254f4086bd0186079d1.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8470cb30c8847dbec7303903a2a95c70.png\")
(Add: 5 + 7 = 12)![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
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.