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

Toán Lớp 6: 12987-x-[(-720)+12471+247]ư=12987

Toán Lớp 6: 12987-x-[(-720)+12471+247]ư=12987

Comments ( 2 )

  1. $#Dream$

    12987-x-[(-720)+12471+247]=12987

    12987-x-774=12987

    774-x=12987-12987

    774-x=0

    x=0+774

    x=774

    Vậy x=774

  2. 12987-x-[(-720)+12471+247]=12987

    =>-x-[(-720)+12471+247]=12987-12987

    =>-x-[(-720)+12471+247]=0

    =>-x-(-720+12471+247)=0

    =>-x+720-12471-247=0

    =>-x-11998=0

    =>-x=11998

    =>x=-11998

    Vậy x=-11998

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