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

Toán Lớp 7: Tìm x: `x+2x+3x+4x=(1000-100):10`

Toán Lớp 7: Tìm x:
x+2x+3x+4x=(1000-100):10

Comments ( 2 )

  1. x+2x+3x+4x=(1000-100):10
    10x=900:10
    10x=90
    x=90:10
    x=9
    Vậy x=9
    Cho mk xin hay nhất please
    Thank you

  2. x+2x+3x+4x=(1000-100):10
    ⇔x(1+2+3+4)=900:10
    ⇔10x=90
    ⇔x=90:10=9

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