6.
[tex]2(x + 3 + x - 1) = 62 \\ 2x + 6 + 2x - 2 = 62 \\ 4x + 4 = 62 \\ 4x = 58 \\ x = 14.5[/tex]
Zatem jeden bok ma
[tex]14.5 + 3 = 17.5[/tex]
Drugi bok
[tex]14.5 - 1 = 13.5[/tex]
Pole
[tex]17.5 \times 13.5 = 236.25 {cm}^{2} [/tex]
7.
[tex]x - 5 + x + x = 31 \\ 3x - 5 = 31 \\ 3x = 36 \\ x = 12[/tex]
Wiek Kasi
[tex]12 - 5 = 7[/tex]
