Examples of...

Popular examples

Top Examples

Examples of Equations

Equations

Post by

An equation is a mathematical statement that has two expressions separated by an equal sign. The expression on the left side of the equal sign has the same value as the expression on the right side.
**natttt***Posted on 2011-02-01 14:00:31*

One or both of the expressions may contain variables. Solving an equation means manipulating the expressions and finding the value of the variables.

An example might be: x = 4+8

to solve this equation we would add 4 and 8 and find that x = 12.

Other example might be: x - 3 = 5

To keep an equation equal, we must do exactly the same thing to each side of the equation. If we add (or subtract) a quantity from one side, we must add (or subtract) that same quantity from the other side.

to solve this equation we would add 3 to both sides. The equation would become x - 3 + 3 = 5 + 3. This becomes x = 5 + 3 or x = 8.

The equation: 7x = 21

To keep both sides of an equation equal, we must do exactly the same thing to each side of the equation. If we multiply (or divide) one side by a quantity, we must multiply (or divide) the other side by that same quantity.

In order to solve this equation we would divide both sides by 7. The equation would become 7x/7 = 21/7. When simplified, this would become x = 21/7 or x = 3.

It is possible to substitute the value of x back into the original equation 7*3=21.

Is this example useful?

To share this example, copy and paste this code into your website, blog or forum:

Comments

**To leave a comment, you must register for free or if you are already registered log in.**

Has not written any comments yet.

Related examples

Find the Median Value Posted on 2011-05-05 18:41:40

The Median is the "middle number" (in a sorted list of numbers). To find the Median, place the numbers you are given in value order and find...Convert Areas Posted on 2011-05-05 10:34:38

To convert area, simply remember that area is length by width:
Area = Length × Width
So, you need to convert once for the length and once a...Convert Volumes Posted on 2011-05-05 10:33:40

Conversion is simply a matter of multiplying by the right number.
For example: Convert 30 cubic feet into cubic meters (30 ft3 to m3)
The...Convert Lengths Posted on 2011-05-05 10:32:44

Conversion is simply a matter of multiplying by the right number.
For example, the conversion for kilometers into miles is:
1 km = 0.6214 m...Convert Metric to imperial Posted on 2011-05-05 10:29:21

Conversion is simply a matter of multiplying by the right number.
Some examples:
What is 2,000 meters in Imperial?
1. In the chart it sho...