Mathematics
Junior High
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数学の文字と式の問題です、教えてください(TT)
a%の食塩水200gにb%の食塩水300gを加えた食塩水500gに含まれる食塩の量は何gか、aをbで用いて表しなさい。
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わかりやすいです、ありがとうございます(><)