Difference between revisions of "Variable"

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A '''variable''' does not have a set value.  Its value can change, and a '''variable''' is used to represent unknowns in equations.
 
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, q, and many [[Greek letter]]s.
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Any symbol may be used as a variable, but the most common variables are x, y, z, n, a, b, c, p, q, and many [[Greek alphabet|Greek letters]].
  
 
== Examples ==
 
== Examples ==

Revision as of 19:35, 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, q, and many Greek letters.

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.

$\displaystyle7+n=10$