eclipse - Android 5.0 is not supporting for lower versions -

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Please help me get this error resolved for more than 3 days

I Did not make the proper resolution I updated my eclipse to run Android 5.0.

I created a simple Android application using the minimum version 16 and the target version 21 to run Android 5.0 Content Themes. The theme is added in styles.xml

I followed the link to add support libraries appcompatv7.

But I'm getting the error stating that can not be resolved for R variable whenever I add this project to my project please give me a suggestion Please and also participate in your lower version of Android 5.0 project

Use more than 21 themes for API less. Android instead of AppCompat: Theme. Content

Please read here


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