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

Toán Lớp 6: ( 3 X – 40 : 2 ) x 5^7 = 5 ^7

Toán Lớp 6: ( 3 X – 40 : 2 ) x 5^7 = 5 ^7

Comments ( 2 )

  1. color{red}\text{Merry Christmas!}
    ( 3x – 40 : 2 ) x 5^7  = 5 ^7
     3x – 40 : 2  = 5 ^7 : 5^7
     3x – 40 : 2  = 78125 : 78125
    3x – 40 : 2  = 1
     3x – 40 = 1 . 2
    3x – 40 = 2
           3x  = 2 + 40
           3x  = 42 
             x  = 42 : 3
            x  = 14

  2. (3x-40:2).5^2=5^7
    (3x-40:2)=5^2
    (3x-40:2)=25
    3x-20=25
    3x=45
    x=15
     

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