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8％の食塩水と3％の食塩水を混ぜて6％の食塩水を200g作りたい。2種類の食塩水をそれぞれ何gずつ混ぜればよいか
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8％の食塩水と3％の食塩水を混ぜて6％の食塩水を200g作りたい。2種類の食塩水をそれぞれ何gずつ混ぜればよいか
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