#### notes

Linear equation is a algebric equation having degree as 1, we can say `2x+5=0` is a linear equation, as the degree of the variable x is 1. But in linear equation in two variable have two variables. Eg. `2x+5y-1=0` is in the form of linear equation with two variables x and y. `ax+by+c=0` is a standard form of linear equation in two variables, here a is the coefficient of x, b is the coefficient of y and c is a constant term, a,b and c are real numbers, also a and b are not equal to zero.

In this chapter we have to learn about the Pair of Linear Equations in Two Variables. Generally Pair of Linear Equations in Two Variables are written as `a_1x+b_1y+c_1=0` and `a_2x+b_2y+c_2=0.` Example `2x+9y+12=0` and `6x+1y+8=0`

To learn how to solve Pair of Linear Equations in Two Variables there are two methods one is Graphical and other is Algebraic. We will study this in the following concepts.