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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: tìm x 25 – (30 + x) = x – (27 – 8)

Toán Lớp 6: tìm x
25 – (30 + x) = x – (27 – 8)

Comments ( 2 )

  1. 25 – (30 + x ) = x – (27 – 8 )
    25 – 30 – x = x – 19
    – 5 – x = x – 19
    – x – x = -19 -+ 5
    – 2x = – 14
    x = 7

  2. Giải đáp:

    S={7}

    Lời giải và giải thích chi tiết:

    25-(30+x)=x-(27-8)

    <=> 25-30-x=x-19

    <=> -x-x= -19-25+30

    <=> -2x=-14

    <=> x= (-14)/(-2)

    <=> x=7

    Vậy S={7}

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222-9+11+12:2*14+14 = ? ( )

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