Question

am nevoie repede va rog!!!​

Answer 1

Notăm :

r - numărul kilogramelor de roșii;

c - numărul kilogramelor de castraveți.

$\it r+c=200\ \ \ \ \ (1)\\ \\ 4,5r+3,6c=792|_{\cdot10} \Rightarrow 45r+36c=7920|_{:9} \Rightarrow 5r+4c=880 \Rightarrow \\ \\ \Rightarrow r+4r+4c=880 \Rightarrow r+4(r+c)=880\ \stackrel{(1)}{\Longrightarrow}\ r+4\cdot200=880 \Rightarrow \\ \\ \Rightarrow r+800=880 \Rightarrow r=80kg\ \ \ \ \ \ (2)\\ \\ (1),\ (2) \Rightarrow 80+c=200|_{-80} \Rightarrow c=120kg$