Новое решение

Sergey_Kuleshov правка от
правка #19416 позже →
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+### Statement
+
+$12.1.5.$ [Insert the problem statement]
+
+### Solution
+
+![For problem $12.1.5$ |799x114, 31%](../../img/12.1.5/scan-0.png)
+
+
+
+#### Answer
+
+[Insert a concise answer or boxed result]