Dictionary
search :       browse : 
A B C D E F G H I J K L M
  N O P Q R S T U V W X Y Z
         
Description
Related Terms
Everyday Examples
Interactive Checkpoint
More Information
Challenge
How to use this dictionary
Contact
 Description  
 Equation:  A mathematical sentence that contains an equals sign.
Suppose each audio CD costs $12.00 at a certain store. Let's write an equation to determine the total cost (without tax) for the number of CDs you want to purchase.

c = 12n


c is a variable representing the total cost and n is the variable representing the number of CDs purchased. The number 12 is the coefficient of n. If you bought 1 CD, then the total cost is $12.00. If you bought 3 CDs, then the total cost is $36.00. Note that the variables may represent more than one amount.

In the equation t = 5 + n, the coefficient of n is 1 and NOT 5 because 5 is being added to n and not being multiplied by n.