**Important Concepts and Formulas**

2. An equation has two sides separated
by the symbol (=). The two sides are LHS and RHS.

3. A solution of an equation is a
numerical value, which when substituted for the variable in the equation makes
the equation true.

4. There are different methods for
finding the solution of an equation. To solve an equation in one variable, we
can

·
add
the same number to both sides.

·
subtract
the same number from both sides.

·
multiply both sides by the same number.

·
divide both sides by the same (non-zero)
number.

5. The concept of algebraic equation can
be utilized to solve problems related to real-life situations.