The expression is .
According to division property of equality: If a = b then .
(Divide each side by 2)
(Cancel common terms)
![\"\"](\"/userfiles/image/Library/division_property_of_equality.gif\")
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=93ffc461b522a27918816550b8687597.png\")
.![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=776f3a93b467d9b615b04c3c96be109a.png\")
.![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2dc383e86e8046f13f16a50c8c09f376.png\")
(Divide each side by 2)![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=35540164565c63de7a0198022a7f1261.png\")
(Cancel common terms)![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=30b8215bbea5b0cc84e0d9677947f7a6.png\")
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
.