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

Toán Lớp 6: (-14)-x+(-15)=-10 giúp tôi với

Toán Lớp 6: (-14)-x+(-15)=-10 giúp tôi với

Comments ( 2 )

  1. ( -14 ) – x + ( – 15 ) = -10
    ( -14 ) – x – 15 = -10
    -x – ( 14 + 15 ) = -10
    -x – 29 = -10
    -x = -10 + 29
    -x = 19
      x = -19
    Vậy x = -19
    #TNT
     

  2.     -14 – x + ( – 15 ) = -10
    ⇔ -14 – x – 15 = -10
    ⇔ -x – ( 14 + 15 ) = -10
    ⇔ -x – 29 = -10
    ⇔ -x = -10 + 29
    ⇔ -x = 19
    ⇔ x = -19
    Vậy x = -19
     

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