Suppose we have an equation,

  3x + 2 = 8

 

We had found it’s solution using trial & error.

But, that is a very long method.

 

Let’s solve the equation by other methods

 

Method 1

3x = 8 + 2

Putting 2 on right side

3x = 8 − 2

3x = 6

3 multiplied on left side will be 3 divided on right side

x = 6/3

x = 2

So, x = 2 is the solution

 

 

Method 2

3x + 2 = 8

Subtracting 2 on both sides

3x + 2 − 2 = 8 − 2

3x = 6

Dividing 3 on both sides

3x/3 = 6/3

x = 2

So, x = 2 is the solution

 

Solve x + 3 = 0

 

x + 3 = 0

Putting 3 on right side

x = 0 − 3

x = −3

 

So, x = −3 is the solution

 

 

Solve x − 7 = 1

 

x − 7 = 1

Putting 7 on right side

x = 1 + 7

x = 8

 

So, x = 8 is the solution

 

 

Solve 5x = 25

 

5x = 25

5 multiplied on left side will be 5 divided on right side

x = 25/5

x = 5

 

So, x = 5 is the solution

 

Solve x / 3 = 2

 

x/3 = 2

3 divided on left side will be
3 multiplied on right side

x = 2 × 3

x = 6

 

So, x = 6 is the solution

 

Solve 8x / 11 − 3 = 5

 

8x/11 − 3 = 5

8x/11 = 5 + 3

8x/11 = 8

x = 8 × 11/8

x = 11

 

So, x = 11 is the solution

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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.