Respuesta :

Answer:

Jack ran 38 km and Ted ran 43 km.

Step-by-step explanation:

Let Jack’s displacement be [tex]x[/tex]

[tex]x + (x+5) = 81[/tex]

[tex]2x + 5 = 81\\2x = 76[/tex]

[tex]x = 38 km[/tex]

[tex]x+5 = 38 + 5\\x+5 = 43km\\[/tex]