- A variable is something that does not have a fixed value. The value of a variable varies.
- Variables are represented by English letters such as x, y, z, a, b, c etc.
- A combination of variables, numbers and operators (+, –, × and ÷) is known as expression.
- Using different operations on variables and numbers, expressions such as , can be formed.
Meena’s age is 4 years less than 7 times the age of Ravi. Express it using variables.
Let the age of Ravi be x years.
7 times the age of Ravi can be expressed as 7x.
4 years less than 7 times the age of Ravi can be written as 7x – 4.
∴ Age of Meena = (7x – 4)
To view the complete topic, please