Worked examples
Two examples
Example 1
Four times a number, plus 7, is 35. What is the number?
- The equation: 4x + 7 = 35.
- Subtract 7: 4x = 28. Divide by 4.
Answer: 7
Example 2
A taxi charges $3 to start plus $2.50 for each mile. A ride cost $18. How many miles was it?
- The equation: 3 + 2.5m = 18.
- Subtract 3: 2.5m = 15. Divide by 2.5.
Answer: 6 miles
Where this is taught: Algebra Practice 1, “16. From words to an equation to the answer”
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:
Type the number only. Then press Check my answers at the bottom.Write each answer on the line. The answer key, with the reasoning, is on the last page.