# Difference between revisions of "Variable"

(→Definition: i is not usually used as a variable, p and q are) |
Mysmartmouth (talk | contribs) (→Examples) |
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== Examples == | == Examples == | ||

− | What | + | What number, when added to 7, gives a sum of 10? |

Write an equation that uses a '''variable''' to represent the part that is unknown. | Write an equation that uses a '''variable''' to represent the part that is unknown. | ||

<math>\displaystyle7+n=10</math> | <math>\displaystyle7+n=10</math> |

## Revision as of 13:20, 8 July 2006

## Definition

A **variable** does not have a set value. Its value can change, and a **variable** is used to represent unknowns in equations.

Any symbol may be used as a variable, but the most common variables are x, y, z, n, a, b, c, p, and q.

## Examples

What number, when added to 7, gives a sum of 10?

Write an equation that uses a **variable** to represent the part that is unknown.