To determine which of the equations has no solution, we can analyze each option:
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3x + 4 = 3x + 4: This equation simplifies to 0 = 0, which is true for all values of x. So, it has infinitely many solutions.
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3x + 4 = 3x + 3: This simplifies to 4 = 3, which is false. Therefore, this equation has no solution.
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3x + 4 = 4x + 3: Rearranging gives 3x - 4x = 3 - 4, or -x = -1, which is solvable (x = 1). So, it has one solution.
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4x + 3 = 3x + 3: Rearranging gives 4x - 3x = 3 - 3, or x = 0. This also has a solution.
Thus, the example of an equation with no solution is:
3x + 4 = 3x + 3.