# Simple Equations and Its Applications: Applications of Simple Equations (For CBSE, ICSE, IAS, NET, NRA 2022)

Doorsteptutor material for competitive exams is prepared by world's top subject experts: get questions, notes, tests, video lectures and more- for all subjects of your exam.

## What is Simple Equation?

A mathematical equation which represents the relationship of two expressions on either side of the sign. It mostly has one variable and equal to symbol. Example: . In the given example, x is a variable.

In equation, . What is the solution to this equation and what is the meaning? The solution of the above linear equation is

## Applications of Simple Equations

Let us assume a situation, in which you go to the market to buy mangoes in a supermarket. Your mother gave you ₹ 100 and said that you can keep ₹ 40 for buying chocolates and for the remaining amount, you need to buy mangoes. When you went to the market, you found out that the price of one kg of mangoes was ₹ 12. So, the final question is how much mangoes you should buy, so that everyone is satisfied. You remember that you learned the concept of simple equations in your class, so let us apply the same here. Let us assume that you have to purchased kg of mangoes, so the total amount of money that you will be spent on buying mangoes will be Now, you have ₹ 40 for yourself, so you have an equation:

This is the same equation as above. Now when you will solve this, you will get to know that the value of is It means that you can buy 5 kg mangoes and spend on buying chocolates. This is one of the general applications of simple equations.

### Transposition

The process of moving a term from one side of the equation to the other side is called transposing. It is the same as adding and subtracting a number from both sides of the equation.

Example 1: Solve

Transposing 9 to the other side we get,

Transposing 5 to the other side we get,

Example2:

Transporting 10 to the other side we get,

Transporting 25 to the other side we get,

Hence it could be stated without doubt that the use of simple equations is applicable everywhere and not just restricted to classrooms.