Linear Equations in One Variable

Linear Equations in One Variable

Points to be Remember:-

1. Any value of the variable that satisfies the given equation is called

    a solution or the root of the equation.

2. The equality symbol ( = ) in the equation remains unchanged, if

     we:

     (i) add the same number on both sides of the equation.

    (ii) subtract the same number from both sides of the equation.

   (iii) multiply both sides of the equation by the same non-zero 

         number.

   (iv) divide both sides of the equation by the same non-zero 

         number.

3. By transposing a term we simply means changing its sign and

    carrying it to the other side of the equation.

4. To solve a word problem, denote the unknown by some variable 

     and translate the statements of the problem step / word by

     step / word into a mathematical statement i.e. an equation, and 

     then find the solution of the equation.