Chemistry
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(99+x)0.1=x
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Answers

(99+x)×0.1=x ならば

●両辺を10倍して

99+x=10x

●移項・整理して

 9x=99

●両辺を9で割り

 x=11

確認

 左辺=(99+11)×0.1=110×0.1=11

 右辺=11

  合っているようです

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