trei patrimi - înseamna 3/4
sfetul unui numar- inseama n/4
[tex]\bf \dfrac{3}{4}\cdot\dfrac{n}{4} =20\:\:|\cdot 16[/tex]
[tex]\bf 3n=20\cdot16[/tex]
3n = 320
n = 320 : 3
n = 106,66
[tex]\it Fie\ x-\ num\breve{a}rul\ cerut.\\ \\ \dfrac{3}{4}\ din\ \dfrac{x}{4}=20 \Rightarrow \dfrac{3}{4}\cdot \dfrac{x}{4}=20 \Rightarrow \dfrac{3}{16}x=20 \Rightarrow x=20\cdot \dfrac{16}{3} \Rightarrow x= \dfrac{320}{3}=106 \dfrac{2}{3}[/tex]
