Apps Error:(20, 47) error: cannot find symbol variable sample_text

[Snake Pliskin]

Need advice, stuck in Android Studio building a new app.
Error20, 47) error: cannot find symbol variable sample_text

Error:Execution failed for task ':app:compileDebugJavaWithJavac'.

> Compilation failed; see the compiler error output for details.

Information:BUILD FAILED
Got it figured out, SOLVED thanks