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

Toán Lớp 6: 78 – 2^3 . [ 32 – ( 2 + x ) . 9 ] = 38

Toán Lớp 6: 78 – 2^3 . [ 32 – ( 2 + x ) . 9 ] = 38

Comments ( 2 )

  1. #huy
    78 – 2^3 . [ 32 – ( 2 + x ) . 9 ] = 38
    <=>78-8.[32-(2+x).9]=38
    <=>8.[32-(2+x).9]=78-38=40
    <=>[32-(2+x).9]=40:8=5
    <=>(2+x).9=32-5=27
    <=>2+x=27:9=3
    <=>x=3-2
    <=>x=1
    Vậy x=1
     

  2. 78 – 2^3 . [ 32 – ( 2 + x ) . 9 ] = 38
    8 . [ 32 – ( 2 + x ) . 9 ] = 78 – 38 = 40
    32 – ( 2 + x ) . 9 = 40 : 8 = 5
    ( 2 + x ) . 9 = 32 – 5 = 27
    2 + x = 27 : 9 = 3
    x = 3 – 2 = 1
    vậy x = 1
    @AIGA
    chúc bạn học tốt!!!

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