Sam and Drew have a combined age of 54. Sam is half of Drew's age. How old is Sam? Let's answer step by step:
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Let x be Drew's age. Sam is (1 / 2)x. x + (1 / 2)x = 54. (3 / 2)x = 54. 3x = 108. x = 36. Sam is 36 / 2 = 18 years old. The answer: 18.
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