Difference between revisions of "Variable"

(Definition: i is not usually used as a variable, p and q are)
(Examples)
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== Examples ==
 
== Examples ==
  
What plus 7 is 10?
+
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.

$\displaystyle7+n=10$

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