Read this page. After you review the examples, you can use addition property to determine whether two equations are equivalent. Click on the "new problem" button at the end of the article to try a practice problem and check your answer. Continue this process by clicking on "new problem," and try to solve at least 10 practice problems or more, if necessary.

Click http://www.onemathematicalcat.org/algebra_book/online_problems/add_prop_eq.htm link to open resource.