python/1418.cpp at main - python - YLT

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HuangHai 1f397eca87 'commit'

2025-08-30 18:35:01 +08:00

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 /*
 小红 a
 小明 b
 b-(a-b) = 1/3 * a ①
 a+(a-b)= 3 * b-30 ②
 b-a+b=1/3 *a => 2b=4/3a  => 4b=8/3a  ③
 a-b=3b-30 =>               4b=2a+30 ④
 /3a=2a+30   => 8/3a-2a=30 =>8a-6a=90 => 2a=90 => a=45
 带回 ③ b=30
 答：小红45岁，小明30岁
 */