Give the step-by-step reasoning process and then the final answer. Brett has 24 more blue marbles than red marbles. He has 5 times as many blue marbles as red marbles. How many red marbles does he have?
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Let x be the number of red marbles. 5 * x = x + 24. 4 * x = 24. x = 6.
The final answer: 6.
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