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No matter what the value of X is, the equation ax-b-4x = 3 is always true. Find the value of 12ab
The equation is transformed into (A-4) x = 3 + B. according to the meaning of the question, the condition of the equation is independent of the value of X, then A-4 = 0, the solution is a = 4, at this time, 3 + B = 0, the solution is b = - 3, then: 12ab = 12 × 4 × (- 3) = - 6
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