Question

2x +3y supra 7x -2 y = 21 supra 11 aflati x supra y

Answer 1

[tex]\frac{2x+3y}{7x-2y}=\frac{21}{11}\\ 11(2x+3y)=21(7x-2y)\\ 22x+33y=147x-42y\\ 75y=125x\\ 3y=5x=\ \textgreater \ x=\frac{3y}{5}\\ \frac{x}{y}=\frac{\frac{3y}{5}}{y}\\ \frac{x}{y}=\frac{3y}{5}*\frac{1}{y}=\frac{3}{5}[/tex]