# Completely justified example

An example displays a problem and a sequence of steps leading up to an answer. If the example is "completely justified," then each of the steps includes a description of the reasoning that generates it, which is usually the application of one or more knowledge components. For instance, Suppose the problem is "Solve 2x+3=10 for x." A completely justified example, written in traditional 2-column format, is:

- 2x+3=10 Given
- 2x=10-3 Subtract-both-sides
- 2x=7 Simplify
- x = 7/2 Divide-both-sides
- x = 3.5 Simplify

The equations are the steps; the text after each equation is its justification.