The Ages of Giant Pandas Jia Jia and Kai Kai at River Safari

The Giant Pandas Jia Jia and Kai Kai

The giant pandas Jia Jia and Kai Kai reside at the River Safari. The sum of their ages when they first arrived in Singapore in 2012 was 9 years. Kai Kai is 1 year older than Jia Jia. Find their ages in 2014.

Question:

Find the ages of Jia Jia and Kai Kai in 2014.

Answer:

Jia Jia = 6 years

Kai Kai = 7 years

Explanation:

J + K = 9

K = J + 1

J = 2012 Jia Jia age

K = 2012 Kai Kai age

Replacing the second equation in the first equation:

J + (J+1) = 9

2J + 1 = 9

2J = 9 - 1

2J = 8

J = 8/2

J = 4 years

K = J + 1

K = 4 + 1

K = 5 years

then:

2014 - 2012 = 2

J = 4 + 2 = 6 years

K = 5 + 2 = 7 years