What are Linear Equations in one Variable

Linear Equation in one variable means

• Only one variable
• An = sign
• Highest power 1

Let’s take some examples

x + 1 = 0

Here,

• There is only 1 variable − x
• There is an equal sign
• Highest power of x is 1 (x ¹ = x)

∴ It is linear equation in one variable

2x + 3 = 0

Here,

• There is only 1 variable - x
• There is an equal sign
• Highest power of x is 1 (x ¹ = x)

∴ It is linear equation in one variable

4x + 5 = 108

Here,

• There is only 1 variable - x
• There is an equal sign
• Highest power of x is 1 (x ¹ = x)

∴ It is linear equation in one variable

3x

There is no equal sign

∴ It is not a linear equation in one variable

4x ² + 1 = 0

Highest power of x = 2

∴ It is not a linear equation in one variable

3x + 2y = 3

Here, we have two variables x & y

∴ It is not a linear equation in one variable