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

Toán Lớp 6: (2y-5).3=3^4 tìm y giúp mình nha l

Toán Lớp 6: (2y-5).3=3^4 tìm y giúp mình nha l

Comments ( 2 )

  1. (2y-5).3=3^4
    2y-5    = 3^4 : 3
    2y-5    = 3^3
    2y-5    = 27
    2y        = 27 + 5
    2y        = 32
     y         = 32 : 2
     y         = 16

  2. Giải đáp :
    ( 2y – 5 ) . 3 = 3^4
    ( 2 . y – 5 ) . 3 = 3^4
    ( 2 . y – 5 ) . 3 = 81
    2 . y – 5 = 81 : 3
    2 . y – 5 = 27
    2 . y = 27 + 5
    2 . y = 32
        y = 32 : 2
        y = 16

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

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