Mathematics
Junior High
Resolved
模範解答は(21ー7y)/ 3ですが、私は7+ (-7y )/ 3と解答しました。模範解答じゃないと正解にはなりませんか?
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a
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3x + 7y = 21 〔z〕
O
(3)次の等式を〔 〕 内の文字について解きなさい。 (
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