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

Toán Lớp 8: x-2^3+2X+1^3 -9X+1^3=16 tìm x

Toán Lớp 8: x-2^3+2X+1^3 -9X+1^3=16 tìm x

Comments ( 2 )

  1. Lời giải:
    x-2^(3)+2x+1^(3)-9x+1^(3)=16
    ⇔x-8+2x+1-9x+1=16
    ⇔(x+2x-9x)+(-8+1+1)=16
    ⇔-6x-6=16
    ⇔-6x=22
    ⇔x=-11/3
    Vậy x=-11/3

  2. x-2^3+2x+1^3-9x+1^3=16
    <=> x-8+2x+1-9x+1=16
    <=> x-6+2x-9x=16
    <=> -6x-6=16
    <=> -6x=22
    <=> -x=22/6
    <=> x=-22/6
    <=> x=-11/3
    Vậy x=-11/3

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

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