Example 1 · Algebra
Solve 3(2x − 1) = 15. What is x?
- A.2
- B.3
- C.4
- D.6
- E.9
Show answer and worked explanation
Answer B: 3
Divide both sides by 3 to obtain 2x − 1 = 5. Add 1, then divide by 2: x = 3.
Check the original expression: 3(2 × 3 − 1) = 3 × 5 = 15. Keeping the bracket intact avoids a distribution error.
