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

Toán Lớp 5: 80,64 : ( X + 5 ) = 7,3 ( dư 0,34)

Toán Lớp 5: 80,64 : ( X + 5 ) = 7,3 ( dư 0,34)

Comments ( 2 )

  1. 80,64 : (x + 5) = 7,3 dư 0,34
    x + 5 = (80,64 – 0,34) : 7,3
    x + 5 = 80,3 : 7,3
    x + 5 = 11
    x = 11 – 5
    x = 6
    Vậy x = 6

  2. 80,64 : (x+5) = 7,3  ( dư 0,34 )
    -> 80,64 = 7,3 × (x+5) + 0,34
    -> 80,64 = 7,3 × x +7,3 ×5 +0,34
    -> 80,64 = 7,3 × x + 36,84
    -> 7,3 × x = 80,64 – 36,84
    -> 7,3 ×x = 43,8
    -> x = 43,8 : 7,3
    ->x = 6
    Vậy x =6

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