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

Toán Lớp 5: tìm x: x * 9,9 + x : 10 = 20,06

Toán Lớp 5: tìm x:
x * 9,9 + x : 10 = 20,06

Comments ( 2 )

  1. x × 9,9 + x : 10 = 20,06
    x × 9,9 + x × 0,1=20,06
    x × (9,9 +0,1)     =20,06
    x × 10                =20,06
    x                        =20,06 : 10
    x                        =2,006
    Vậy x=2,006

  2. Trả lời:
    $x \times 9,9+x:10=20,06$
    $\Rightarrow$$x \times 9,9 +x \times 0,1=20,06$
    $\Rightarrow$$x \times (9,9+0,1)=20,06$
    $\Rightarrow$$x \times 10=20,206$
    $\Rightarrow$$x=20,06:10$
    $\Rightarrow$$x=2,006$
    $\text{Vậy}$ $x=2,006$

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

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