Respuesta :

semsee45

Answer:

Given:

  • Total horses tested = 140
  • Horses that had Lyme disease = 42
  • Horses that had arthritis = 112

Let x = number of horses that had BOTH Lyme disease and arthritis.

⇒ (112 - x) + (42 - x) + x = 140

⇒ 154 - x = 140

⇒ x = 14

Therefore, place 14 in the middle overlapping area.

To find the number to place in the left section:  42 - 14 = 28

To find the number to place in the right section:  112 - 14 = 98

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