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

Toán Lớp 6: 461+( x-45)=387 11 -( -53 +x )=97

Toán Lớp 6: 461+( x-45)=387
11 -( -53 +x )=97

Comments ( 2 )

  1.    Giải đáp +Lời giải :
      $\text{461+(x-45)=387}$
    $\text{⇔ x – 45 = -74}$
    $\text{⇔ x= -29 }$
    $\text{Vậy x=-29}$
      $\text{11-(-53=x)=97}$
    $\text{⇔ -53 + x = -86}$
    $\text{⇔ x = -33}$
    $\text{Vậy x = -33}$

  2. 461 + ( x – 45 ) = 387
    => 461 + x – 45 = 387
    => ( 461 – 45 ) + x = 387
    => 416 + x = 387
    => x = 387 – 416
    => x = -29
      $\text{ Vậy x = -29 }$
    $\text{ _____________________ }$
    11 – ( -53 + x ) = 97
    => 11 + 53 – x = 97
    => 64 – x = 97
    => x = 64 – 97
    => x = -33
      $\text{ Vậy x = -33 }$
     

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