For which value of a does the equation (a − 1)x = 4 have no solution?
Correct answer: C. a = 1
- A. a = −1
- B. a = 0
- C. a = 1
- D. a = 4
Explanation
When a = 1, the equation becomes 0x = 4, which is impossible and therefore has no solution. For other listed values, the coefficient of x is nonzero and a unique solution exists.
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