Variable Definition Math

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Variables play an important role in any given algebraic expression or equation. Variables are the letters or alphabets found in most of the math formulas, expressions or equations and the prominence of these variables is that they can take in any number as their value, according to the given question. Numbers written in an expression or an equation are known as constants, because they are constant or fixed with their value unlike variables. Variables in math are very useful since they give us the freedom to assign them values accordingly.

Example 1: Solve the given equation to find the value of the variable, 5p – 6 = 4.

Given equation: 5p – 6 = 4

In the above equation, the variable is the alphabet ‘p’ since variables are always represented by letters.

Solving the equation means to find the value of ‘p’ in the given equation.

5p – 6 = 4 ==> 5p = 4 + 6 -> 5p = 10

This gives: p = 10/5 -> p = 2.

Hence the value of the variable, p = 2.
 
Example 2: Solve the given equation to find the value of the variable, 3x + 8 = -10

Given equation: 3x + 8 = -10

In the above equation, the variable is the alphabet ‘x’ since variables are always represented by letters.

Solving the equation means to find the value of ‘x’ in the given equation.

3x + 8 = -10 ==> 3x = -10 – 8 -> 3x = -18.

This gives: x = -18/3 -> x = -6.

Hence the value of the variable, x = -6.
 
 

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