** A mathematical expression** is a simple math relationship between a variable and a number. The **variable **is the quantity which can take any value accordingly (usually represented by an **alphabet**). However, an **Equation** relates two different expressions with an **‘equality’** sign.

**Examples of ExpressioHow do you write an expression?ns:**

For Equations, not only can be it evaluated but also the value of the unknown variable can be found out! There can be a single or multiple solutions for the variable depending on the type of equation.

**Examples of Equation:**

**Example: **Solve 5x – 6 = 2x +15

Here **2 expressions** are combined together to form an **equation**!

** -> **5x- 2x -6 = 15 (Subtract ‘2x’on both sides)

** -> **3x=15+6(Add ‘6’ on both sides)

** ->** 3x=21

** -> **x=21/3

** ->** **x = 7**

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