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