Question

Rezolvați ecuația: 0,x(y)+0,y(x)=0,(5)

Answer 1

[tex]\overline{0,x(y)}+\overline{0,y(x)}=0,(5)\\ \dfrac{\overline{xy}-x}{90}+\dfrac{\overline{yx}-y}{90}=\dfrac{5}{9}|\cdot 90\\ \overline{xy}-x+\overline{yx}-y=50\\ 10x+y-x+10y+x-y=50\\ 10(x+y)=50\\ x+y=5\\ S: (x,y) \in \{(1,4);(2,3);(3,2);(4,1)\}[/tex]