The document shows the step-by-step working of the expression 4(2x - 7), which equals 8x - 28 when fully simplified. It cautions that a common mistake is forgetting that the minus sign belongs to the 7 term, and not treating 2x - 7 as a single term.

1. Example 3
4(2x – 7)

2. Example 3
4(2x – 7)
8x

3. Example 3
4(2x – 7)
8x – 28
Don’t forget, the minus belongs to
the 7. This is a very common
mistake that students make

4. Example 3
4(2x – 7)
8x – 28