1. Writing algebraic expressions – Word Problem

2. 2000
2001
2002
2003
2004
2005
1999
1998
1997
1996
1995
‘n’ years younger
‘n’ years ago
‘n’ years older
‘n’ years from now
Age decreases
Age increases x
Current age
x-n
x+n

3. Example 1: Radha is ‘x’ years of age now
Example 1: Radha is ‘x’ years of age now. 4 years from now, her age will be _____
Solution:
Given:
Radha’s age is x
To find:
Radha’s age 4 years from now
‘4’ years from now
‘4’ years older
Age increases x
Radha’s age = x
4 years from now she will be 4 years older. So, we have to add 4 years from Radha’s today’s age.
Radha’s age 4 years from now = x+4
Ans: x+4

4. Example 2: Arivazhagan is 30 years younger to his father
Example 2: Arivazhagan is 30 years younger to his father. Write Arivazhagan's age in terms of his father's age.
Solution:
Given:
Arivazhagan is 30 years younger to his father.
Father’s age is unknown.
To find:
Arivazhagan’s age in terms of his father’s age
30 years younger
Age decreases
Arivazhagan’s age
Arivazhagan’s father’s age
Arivazhagan’s fathers age is unknown.
So, Arivazhagan’s father’s age = x
Arivazhagan is 30 years younger than his father. So, his age is 30 years less than his
father’s age (x).
Arivazhagan’s age = x-30
Ans: x-30

5. Try these Sheela’s age is ‘y’ years. What was her age 5 years ago?
Ram’s father is 30 years older than his son Ram. Ram’s age is ____