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

Toán Lớp 6: 720 : [ 41 + ( 2x – 5 ) = 2^2 . 5

Toán Lớp 6: 720 : [ 41 + ( 2x – 5 ) = 2^2 . 5

Comments ( 2 )

  1. 720:[41+(2x-5)]=2^2. 5
    => 720:[41+(2x-5)]=20
    => 41+(2x-5)=36 
    => 2x-5=-5                                         
    => 2x=0
    => x=0
    Vậy x=0

  2. 720 ÷ [ 41 + ( 2x – 5 )] = 2^2 . 5
    720 ÷ [ 41 + (2x – 5 )] = 4 . 5
    720 ÷ [ 41 + (2x – 5 )] = 20
                 41 + ( 2x – 5 ) = 720 ÷ 20
                 41 + ( 2x – 5 ) = 36
                            2x – 5   = 36 – 41
                            2x – 5   = -5
                                  2x   = -5 + 5
                                  2x   = 0
                                     x  = 0 ÷ 2
                                     x   = 0
         @Zun ????
                                   
     

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

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