已知3m_2與_19為相反數(shù),求m的值.
已知3m_2與_19為相反數(shù),求m的值.
數(shù)學(xué)人氣:613 ℃時間:2020-05-08 01:29:37
優(yōu)質(zhì)解答
777怎么求的-(-19=21)-(-19)=1919+2=2121/3=7
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