Advertisement
Online Test Banks
Score higher
See Online Test Banks
eLearning
Learning anything is easy
Browse Online Courses
Mobile Apps
Learning on the go
Explore Mobile Apps
Dummies Store
Shop for books and more
Start Shopping

In algebra, a letter such as x that takes the place of a number in one or more equations is called a variable. Practices you need to know about how algebra problems are written:

  • To add up many of the same variable, count the number of times that variable appears, and then attach that number (called a coefficient) to that variable:

  • x + x + x + x + x = 5x

  • To multiply many of the same variable, count how many times the variable appears, and then attach an exponent to that variable:

  • x · x · x · x = x4

  • Write division problems as fractions:

  • x ÷ 2 is written as x/2

  • Add a Comment
  • Print
  • Share
blog comments powered by Disqus
Advertisement
Advertisement

Inside Dummies.com

Dummies.com Sweepstakes

Win an iPad Mini. Enter to win now!