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

Toán Lớp 6: a).3-(17-x)=289-(36+289) b).25+(x-5)= -415-(15-415) c).(-x)+(-62)+(-46)= – 14 d).484+x=-632+(-548) e).(3x-5)-(x+121)=0 f).(5x-3)-(x-67)

Home/ Toán Lớp 6: a).3-(17-x)=289-(36+289) b).25+(x-5)= -415-(15-415) c).(-x)+(-62)+(-46)= – 14 d).484+x=-632+(-548) e).(3x-5)-(x+121)=0 f).(5x-3)-(x-67)

Toán Lớp 6: a).3-(17-x)=289-(36+289) b).25+(x-5)= -415-(15-415) c).(-x)+(-62)+(-46)= – 14 d).484+x=-632+(-548) e).(3x-5)-(x+121)=0 f).(5x-3)-(x-67)

Tháng Mười Hai 11, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: a).3-(17-x)=289-(36+289)
b).25+(x-5)= -415-(15-415)
c).(-x)+(-62)+(-46)= – 14
d).484+x=-632+(-548)
e).(3x-5)-(x+121)=0
f).(5x-3)-(x-67)=-12

Comments ( 2 )

  1. baoquyen
    baoquyen
    11 Tháng Mười Hai, 2022 at 1:17 sáng
    Reply
    Giải đáp:
    a).3-(17-x)=289-(36+289)
      3-17+x=289-36-289
    x=289-36-289-3+17=-22
    b).25+(x-5)= -415-(15-415)
      25+x-5=-415-15+415
      x=-415-15+415-25+5=-35
    c).(-x)+(-62)+(-46)= – 14
       -x-62-46=-14
    -x=-14+62+46
    -x=94
    x=-94
    d).484+x=-632+(-548)
    484+x=-632-548
    x=-632-548-484=-1664
    e).(3x-5)-(x+121)=0
    3x-5-x-121=0
    3x-x=0+5+121
    2x=126
    x=63
    f).(5x-3)-(x-67)=-12
    5x-3-x+67=-12
    5x-x=-12+3-67
    4x=-76
    x=-19
     

  2. tuyen98
    tuyen98
    11 Tháng Mười Hai, 2022 at 1:17 sáng
    Reply
    $\text{ a)3 – ( 17 – x ) = 289 – ( 36 + 289 ) }$
      $\text{ 3 – ( 17 – x ) = 289 – 325 }$
      $\text{ 3 – ( 17 – x ) = ( – 36 ) }$
              $\text{ 17 – x   = 3 – ( – 36 ) }$
              $\text{ 17 – x   = 3 + 36 }$
              $\text{ 17 – x   = 39 }$
                      $\text{ x   = 17 – 39 }$
                      $\text{ x   = – 22 }$
              $\text{ Vậy x = – 22 }$
    $\text{ b)25 + ( x – 5 ) = – 415 – ( 15 – 415 ) }$
    $\text{ 25 + ( x – 5 ) = – 415 – ( – 400 ) }$
    $\text{ 25 + ( x – 5 ) = – 415 + 400 }$
    $\text{ 25 + ( x – 5 ) = – 15 }$
    $\text{ x – 5   = – 15 – 25 }$
                  $\text{ x – 5   = ( – 15 ) + ( – 25 ) }$
                  $\text{x – 5   = – 40}$
                  $\text{x         = – 40 + 5}$
                  $\text{ x         = – 35 }$
              $\text{ Vậy x = – 35 }$
    $\text{ c)( – x ) + ( – 62 ) + ( – 46 ) = – 14 }$
    $\text{ ( – x ) + ( – 62 ) = – 14 – ( – 62 ) }$
    $\text{ ( – x ) + ( – 62 ) = – 14 + 62 }$
    $\text{ ( – x ) + ( – 62 ) = 46 }$
    $\text{ ( – x ) = 46 – ( – 62 ) }$
    $\text{ ( – x ) = 46 + 62 }$
    $\text{ ( – x ) = 108 }$
    $\text{ x = – 108 }$
    $\text{ Vậy x = – 108 }$
    $\text{ d) 484 + x = – 632 + ( – 548 ) }$
        $\text{ 484 + x = – 1180 }$
                  $\text{ x = – 1180 – 484 }$
                  $\text{ x = ( – 1180 ) + ( – 484 ) }$
                  $\text{ x = – 1664 }$
              $\text{ Vậy x = – 1664 }$
    $\text{ e)( 3x – 5 ) – ( x + 121 ) = 0 }$
    $\text{ ⇒ 3x – 5 – x – 121 = 0 }$
    $\text{ ⇒ 3x – x – 5 – 121 = 0 }$
    $\text{ ⇒ ( 3x – 1x ) – ( 5 + 121 ) = 0 }$
    $\text{ ⇒ ( 3 – 1 )x – 126 = 0 }$
    $\text{ ⇒ 2x – 126 = 0 }$
    $\text{ ⇒ 2x           = 0 + 126 }$
    $\text{ ⇒ 2x           = 126 }$
    $\text{ ⇒   x           = 126 : 2 }$
    $\text{ ⇒   x           = 63 }$
    $\text{ Vậy x = 63 }$
    $\text{ f) ( 5x – 3 ) – ( x – 67 ) = – 12 }$
    $\text{ ⇒ 5x – 3 – x + 67 = – 12 }$
    $\text{ ⇒ 5x – x – 3 + 67 = – 12 }$
    $\text{ ⇒ ( 5x – 1x ) – ( 3 – 67 ) = – 12 }$
    $\text{ ⇒ ( 5 – 1 )x – ( – 64 ) = – 12 }$
    $\text{ ⇒ 4x + 64 = – 12 }$
    $\text{ ⇒ 4x = – 12 – 64 }$
    $\text{ ⇒ 4x = ( – 12 ) + ( – 64 ) }$
    $\text{ ⇒ 4x = – 76 }$
    $\text{ ⇒ x = – 76 : 4 }$
    $\text{ ⇒ x = – 19 }$
    $\text{ Vậy x = -19 }$
    Note :
    – Trước ngoặc là dấu “+” ta bỏ ngoặc và giữ nguyên các dấu của từng số .
    – Trước ngoặc là dấu “-” ta bỏ ngoặc và đổi dấu của từng số .
    _______________________________
    $\text{ #bich2k9❤ }$

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

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