Răspuns :
[tex] \frac{x}{4} =\frac{y}{4}+4=\frac{y}{4}+\frac{16}{4}=\frac{16+y}{4} \\ x=16+y \\ x+y=40 \\ 16+y+y=40 \\ 16+2y=40 \\ 2y=40-16 \\ 2y=24 \\ y=\frac{24}{2} \\ \boxed{y=12} \\ x=16+y \\ x=16+12 \\ \boxed{x=28} [/tex]
I-------I--------I--------I--------I Diana
I----I----I----I----I Monica
I-------I 1/4 Diana
I----I 1/4 Monica
I4I diferenta dintre sferturile fetelor
4*4=16 diferenta intre nr.nuci Diana si nr nuci Monica
40+16=56 daca ar fi avut acelasi nr de nuci
56:2=28 nr nuci Diana
28-16 = 12 nr nuci Monica
I----I----I----I----I Monica
I-------I 1/4 Diana
I----I 1/4 Monica
I4I diferenta dintre sferturile fetelor
4*4=16 diferenta intre nr.nuci Diana si nr nuci Monica
40+16=56 daca ar fi avut acelasi nr de nuci
56:2=28 nr nuci Diana
28-16 = 12 nr nuci Monica