Linear Equations

You have learnt about basic concept of a variable and a constant. You have also learnt about algebraic exprssions, polynomials and their zeroes. We come across many situations such as six added to twice a number is 20. To find the number, we have to assume the number as x and formulate a relationship through which we can find the number. We shall see that the formulation of such expression leads to an equation involving variables and constants. In this lesson, you will study about linear equations in one and two variables. You will learn how to formulate linear equations in one variable and solve them algebraically. You will also learn to solve linear equations in two variables using graphical as well as algebraic methods.