To solve the equation \( 7|2x - 1| + 4 = 3 \), we first isolate the absolute value term.
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Subtract 4 from both sides: \[ 7|2x - 1| = 3 - 4 \] \[ 7|2x - 1| = -1 \]
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Since the absolute value expression \( |2x - 1| \) is always non-negative, the left-hand side \( 7|2x - 1| \) can never be negative. Therefore, \( 7|2x - 1| = -1 \) has no solutions.
Thus, the absolute value equation \( 7|2x - 1| + 4 = 3 \) has 0 solutions.
The final answer is: \[ \text{0} \]