Chapter 2 Class 8 Linear Equations in One Variable
Concept wise

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

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.