An equation which contains two variables and the degree of each term containing variable is one, is called a **linear equation in two variables**.

They are also called as simultaneous linear equations.

The general form of a linear equation in two variables :

[su_note note_color=”#f8f5f3″]*ax + by +c = 0*[/su_note]

Where a, b, c are real numbers and the same time a, b are not equal to zero.

Ex. 2x – y = 4