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

Toán Lớp 6: Tìm x biết (5x:10^2):7=15 Giúp mình với ạ!

Toán Lớp 6: Tìm x biết (5x:10^2):7=15
Giúp mình với ạ!

Comments ( 2 )

  1. Giải đáp:
    (5x : 10^2) : 7 = 15
    5x : 10^2 = 15.7
    5x : 10^2 = 105
    5x = 105. 10^2
    5x = 105. 100
    5x = 10 500
    x = 10500 : 5 = 2100
    Vậy x = 2100
     

  2. (5x : 10^{2}) : 7 = 15
    (5x : 10^{2}) = 15 xx 7
    5x : 100 = 105
    5x = 105 xx 100
    5x = 10500
    x = 10500 : 5
    x = 2100

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