The expression is .
(Commutative property: )
(Distributive property: (b + c) a = ba + ca
(Add: 12+11=23)
The solution is .
![\"\"](\"/userfiles/image/Library/Commutative_Property_of_addition.gif\")
![\"\"](\"/userfiles/image/Library/Distributive_Property4.gif\")
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5b197a3abcb0357c61c982473df96cb2.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4d4bda0f168ffc8f9935461916708ff4.png\")
(Commutative property: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=04ab48db2a6385513b3391bf07d33cff.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=72693b1f5ed0bea7ff8b28a05cd9b309.png\")
(Distributive property: (b + c) a = ba + ca![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d3ef297221a0ebf2742c01b0f45e5572.png\")
(Add: 12+11=23) ![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8b297b7f8eae283ae53f2444eba3be25.png\")
.