Final answer:
After substituting x with 3 in each option, it's clear that the equation 3x + 4 = 3 is the one for which x = 3 is not a solution, as 9 + 4 is not equal to 3.
Step-by-step explanation:
To determine for which equation x = 3 is not a solution, let's substitute x with 3 in each equation and check if the equation holds true.
- A. 2x - 5 = 1 becomes 2(3) - 5 = 1 which simplifies to 6 - 5 = 1, and this is true.
- B. 4x - 1 = 11 becomes 4(3) - 1 = 11 which simplifies to 12 - 1 = 11, and this is also true.
- C. 2x + 1 = 7 becomes 2(3) + 1 = 7 which simplifies to 6 + 1 = 7, and this is true as well.
- D. 3x + 4 = 3 becomes 3(3) + 4 = 3 which simplifies to 9 + 4 = 3, and this is not true.
Therefore, the equation for which x = 3 is not a solution is option D: 3x + 4 = 3.