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# Variable Calculator

A symbol that doesn't have a fixed value is called a variable in Math. It can take any value. A term is a variable alone (or) a constant alone (or) it can be a combination of variables and constants by the operation of multiplication or division.

## What is a Variable Calculator?

'Variable Calculator' is an online tool that helps to calculate the variables for given equations. Online Variable Calculator helps you to calculate the variables for a given equation in a few seconds.

### Variable Calculator

## How to Use Variable Calculator?

Please follow the below steps to find the variables for a given equation:

**Step 1:**Enter the coefficients of equations in the given input box.**Step 2:**Click on the**"Solve"**button to find the variables for a given equation.**Step 3:**Click on the**"Reset"**button to clear the fields and find the variables for different equations.

## How to Find Variable Value?

A linear equation is defined as an equation that is written for two different variables. This equation will be a linear combination of these two variables and a constant.

An equation of the form Ax + By = C. Here, x and y are variables, and A, B, and C are constants.

To solve the variables of the given equations, let's see an example to understand briefly.

## Solved Examples on Variable Calculator

**Example 1:**

Solve 2x + y = 7 and x + y = 5 and verify it using the online variable calculator

**Solution:**

2x + y = 7 ------> (1)

x + y = 5 -------> (2)

From (2), x = 5 - y ------> (3)

Substitute (3) in (1),

2(5 - y) + y = 7

10 - 2y + y = 7

10 - y = 7

y = 3 ------> (4)

Substitute (4) in (2),

x + 3 = 5

x = 2

Therefore, x = 2, y = 3

**Example 2:**

Solve 3x - 2y = 4 and 4x - y = 7 and verify it using the online variable calculator

**Solution:**

3x - 2y = 4 ------> (1)

4x - y = 7 -------> (2)

From (2), y = 4x - 7 ------> (3)

Substitute (3) in (1),

3x - 2(4x - 7) = 4

3x - 8x + 14 = 4

-5x = -10

x = 2 ------> (4)

Substitute (4) in (2),

4x - y = 7

4(2) - y = 7

8 - y = 7

y = 1

Therefore, x = 2, y = 1

Similarly, you can try the online variable calculator to find the algebra value for a given equation

a) 7x + 8y = 17 and x - 16y = 4

b) 11x - 17y = -18 and 12x - 15y = 8

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