Odpowiedź :
Odpowiedź:
[tex]200 = y + xy + 7y + 9y + 18y \\ 200 = 35y + xy[/tex]
[tex]18y = 90 \\ y = 5[/tex]
[tex]200 = 35 \times 5 + 5x \\ 200 = 175 + 5x \\ 25 = 5x \\ x = 5[/tex]
Odpowiedź:
[tex]200 = y + xy + 7y + 9y + 18y \\ 200 = 35y + xy[/tex]
[tex]18y = 90 \\ y = 5[/tex]
[tex]200 = 35 \times 5 + 5x \\ 200 = 175 + 5x \\ 25 = 5x \\ x = 5[/tex]