5/9 of a piece of metal has a mass of 7kg. what is the mass of 2/7 of the piece of metal​

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5/9 of a piece of metal has a mass of 7kg. what is the mass of 2/7 of the piece of metal​

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Thu Thủy 4 years 2021-07-30T16:20:38+00:00 1 Answers 189 views 0

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  1. sori
    0
    2021-07-30T16:21:47+00:00
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    5/9 of mass of metalx=7kg

    5/9*mass ofmetal x=7kg

    divide both sides by 5/9

    value of mass metalx=63/5

    2/7 of mass metalx=?kg

    2/7*63/5=126/35kg=3.6kg

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