Question:
Ishaan is 2 times as old as Christopher. 35 years ago, Ishaan was 7 times as old as Christopher. How old is Christoper now?
Answer:
The present age of Christoper is 42 years old
Solution:
Given that Ishaan is 2 times as old as Christoper
Let the present age of Christoper be "x"
Then, Present age of Ishaan = 2 times as old as Christoper
present age of Ishaan = 2x
35 years ago, Ishaan was 7 times as old as Christopher
Age of Ishaan 35 years ago = Present age of Ishaan - 35
Age of Ishaan 35 years ago = 2x - 35
Similarly,
Age of christoper 35 years ago = Present age of christoper - 35
Age of christoper 35 years ago = x - 35
From given statement, 35 years ago, Ishaan was 7 times as old as Christopher
Age of Ishaan 35 years ago = 7 times the age of Christoper 35 years ago
(2x - 35) = 7(x - 35)
Solve the above equation for "x"
2x - 35 = 7x - 245
2x - 7x = -245 + 35
-5x = -210
x = 42
Thus present age of Christoper is 42 years old