Worked examples
Two examples
Example 1
Is x = 4 a solution of 3x − 2 = 10?
- Put 4 in place of x: 3 × 4 − 2 = 10.
- It matches.
Answer: Yes
Example 2
Is x = −2 a solution of 5x + 1 = 11?
- 5 × (−2) + 1 = −9.
- That is not 11.
Answer: No
Where this is taught: Algebra Practice 1, “17. Is it a solution?”
The drill
Ten problems
This drill also has challenge problems. They use the same skill, set up the way the GED test sometimes sets up a problem, so that it looks new at first.
How many:
Tap your answer to each one, then press Check my answers at the bottom.Circle your answer to each one. The answer key, with the reasoning, is on the last page.