Worked examples
Two examples
Example 1
Solve: 23x = 12
- Multiply both sides by the reciprocal, 32: x = 12 × 32.
Answer: x = 18
Example 2
Solve: x4 + x2 = 9
- Multiply every term by 4 to clear the fractions: x + 2x = 36.
- 3x = 36, so x = 12.
Answer: x = 12
Where this is taught: Algebra Practice 1, “18. A little further”
The drill
Ten problems
How many:
Type each answer, then press Check my answers at the bottom. Commas in large numbers are fine.Write each answer on the line. The answer key, with the reasoning, is on the last page.