[tex]\it Fie\ x,\ y\ cele\ dou\breve a\ numere.\\ \\ Dac\breve a\ x=49,\ \ trebuie\ s\breve a\ afl\breve am\ y,\ cunosc\hat and\ media\ lor\ aritmetic\breve a.\\ \\ m_a=\dfrac{49+y}{2}=34\Big|_{\cdot2} \Rightarrow 49+y=68|_{-49} \Rightarrow y=19[/tex]
