Question

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Answer 1

15.

$\it Zilnic,\ vaca \ va\ consuma\ \dfrac{1}{20}\ din\ cantitatea\ de\ hran\breve a,\ iar\ vi\c{\it t}elul \ va\ consuma\ \dfrac{1}{40}$

$\it Not\breve am \ \ x\ -\ num\breve a rul\ de\ zile\ cerut.\\ \\ \dfrac{1}{40}x+\dfrac{1}{20}(x+5)=1\Big|_{\cdot40} \Rightarrow x+2x+10=40 \Rightarrow 3x=30 \Rightarrow x=10$