Szukane liczby: x, y
[tex]\frac{x+y}{2} = 28 \ \ \ |\cdot 2 \\ x + y = 56 \\ \underline{y = 56 - x} \\\\ \frac{y}{2} = 3x \ \ \ |\cdot 2 \\ \underline{y = 6x} \\\\ Zatem: \\ 6x = 56 - x \\ 6x + x = 56 \\ 7x = 56 \ \ \ |:7 \\ \underline{x = 8} \\\\ y = 6x \\ y = 6 \cdot 8 \\ \underline{y = 48}[/tex]
Odp. Szukane liczby to 8 i 48.
