Linear Equations in One Variable

An equation is an equality connecting some unknowns. The unknowns are represented by “letters” and are called “the variables”. If the equation has only one unknown, it is called “an equal in one variable”. The word “Linear” means “of degree one”. Hence if only a single variable with degree one occurs in an equation, it is called a linear equation in one variable.

 An equation of one variable and of first order (i.e., its highest power is one) is called a Linear equation. Such an equation has only one solution. A solution is also called the ‘root’ of the given equation. 

Question : Solve  ?