Solve the equation for x : 6x - 27 + 3x = 4 + 9 - x
Correct answer: A. 4
- A. 4
- B. 5
- C. 6
- D. -4
- E. None of these
Explanation
Combine like terms: 6x + 3x - 27 = 4 + 9 - x gives 9x - 27 = 13 - x, so 10x = 40 and x = 4. The likely trap is option b, 5, caused by adding the constants incorrectly or forgetting to move -x to the left.
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