xかyでまとめてみましょう。
x(y＋1)ー1ーy＝x(y＋1)ー(y＋1)＝(xー1)(y＋1)
y(xー1)ー1＋x＝y(xー1)＋(xー1)＝(xー1)(y＋1)
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xかyでまとめてみましょう。
x(y＋1)ー1ーy＝x(y＋1)ー(y＋1)＝(xー1)(y＋1)
y(xー1)ー1＋x＝y(xー1)＋(xー1)＝(xー1)(y＋1)
Users viewing this question
are also looking at these questions 😉
ありがとうございます〜😭✨