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