When a dog or a cat is 2 years old it is considered 24 ‘human’ years old. Each year, after age 2 is equal to 4 ‘human’ years. [24 +[[[1]]] (a – 2)] represents the age of a cat or dog in human years where ‘a’ stands for the present age of a dog or cat.

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Detailed Solution

When a dog or a cat is 2 years old it is considered 24 ‘human’ years old. Each year, after age 2 is equal to 4 ‘human’ years. [24 +[4] (a – 2)] represents the age of a cat or dog in human years where ‘a’ stands for the present age of a dog or cat.
Given data,
A cat is 2 years old it is considered 24 ‘human’ years old.
Each year, after age 2 is equal to 4 ‘human’ years.
Calculating the age in human years.
The required equation is