What is the missing reason in the proof?

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What is the missing reason in the proof?

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Trúc Chi 3 years 2021-07-28T11:51:07+00:00 1 Answers 10 views 0

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  1. thuthao
    0
    2021-07-28T11:52:26+00:00
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    What proof? Is there a picture or anything,

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )