Tao học lớp 5 làm sao mà giải được hả?

a, x - 96 = ( 443 - x ) - 15

    x - 96 = 443 - x - 15

    x - 96 = 428 - x 

     x + x = 428 + 96

         2x = 524

           x = 262

b, ( x - 12 ) - 15 = ( 20 - 7 ) - ( 18 - x )

        x - 12 - 15 = 13 - 18 + x 

               x - 27 = - 5 + x

                 x - x = - 5 + 27 

                    0x = 22

=> ko có giá trị nào thõa mãn 

c, 353 - x = 46 + ( 3x - 21 )

    353 - x = 46 + 3x - 21

    353 - x = 25 + 3x 

    - x - 3x = 25 - 353

         - 4x = - 328

             x = 82

d, - ( x + 81 ) = ( 2x +12 ) - ( 5 + x )

         - x - 81 = 2x + 12 - 5 - x

         - x - 81 = x + 7 

           - x - x = 7 + 81

              - 2x = 88

                  x = - 44 

e, ( - x + 821 + 534 ) = 499 + ( x - 84 )

               - x + 1355 = 499 + x - 84

                      - x - x = 499 - 84 - 1355

                         - 2x = - 940

                             x = 470

g, x + 53 = ( 400 - 9x ) - 447

    x + 53 = 400 - 9x - 447

    x + 53 = - 47 - 9x

    x + 9x = - 47 - 53

        10x = -100

           x = - 10

a,    (x-12) -15 = (20-7) - (18+x)

<=> x - 12 - 15 = 13 - 18 - x 

<=> 2x = 22

<=> x = 11

b,     x- 96  = ( 443 - x) - 15

<=> x - 96 = 443 - x - 15

<=> 2x = 524

<=> x = 262

c,     311 - x + 82 = 46 + ( x- 21)

<=> 311 - x + 82 = 46 + x - 21

<=> 2x = 368

<=> x = 184

e,     ( - x + 821 + 534 ) = 499 + ( x-84)

<=> - x + 821 + 534 = 499 + x - 84

<=> 2x = 940

<=> x = 470

f,      x + 96 = ( 443 - x) - 447 

<=> x + 96 = 443 - x - 447

<=> 2x = - 100

<=> x = - 50

d,     - ( x - 3 + 85) = ( x + 70 - 71) -5

<=> - x + 3 - 85 = x + 70 - 71 - 5

<=> 2x = - 76

<=> x = - 38

a) 311 - x + 82 = 46 + (x - 21)

311 - x + 82 = 46 + x - 21

-x - x = 46 - 21 - 311 - 82

-2x = -368

x = -368 : (-2)

x = 184

b) -(x - 3 + 85) = (x + 70 - 71) - 5

-x + 3 - 85 = x + 70 - 71 - 5

-x - x = 70 - 71 - 5 - 2 + 85

-2x = 77

\(1.311-x+82=46+\left(x-21\right)\\ 311+82-x=46-21+x\\ 393-x=25+x\\ 393-x-25-x=0\\ 393-25-x-x=0\\ 368-2x=0\\ \Rightarrow-2x=368\\ x=368:\left(-2\right)\\ x=-184\)

\(2.-\left(x-3+85\right)=\left(x+70-71\right)-5\\ -x+3-85=x+70-71-5\\ -x-82=x-6\\ -x-82-x+6=0\\ -2x-76=0\\ -2x=76\\ x=76:\left(-2\right)\\ x=-38\)

\(3.\left(-x+821+534\right)=499+\left(x-84\right)\\ -x+821+534=499+x-84\\ -x+1355=x+415\\ -x+1355-x-415=0\\ -2x+940=0\\ -2x=-940\\ x=-940:\left(-2\right)\\ x=470\)

\(4.x+96=\left(443-x\right)-447\\x+96=443-x-447\\ x+96=-x-4\\ x+96+x+4=0\\ 2x+100=0\\ 2x=-100\\ x=-100:2\\ x=-50 \)

`[ ( 2 xx x - 11 ) : 3 + 1 ] xx 5 = 20`

`( 2 xx x - 11 ) : 3 + 1=20:5`

`( 2 xx x - 11 ) : 3 + 1=4`

`( 2 xx x - 11 ) : 3 =4-1`

`( 2 xx x - 11 ) : 3 =3`

`2xx x -11=3xx3`

`2xx x -11=9`

`2xx x =9+11`

`2 xx x=20`

`x=20:2`

`x=10`

Vậy `x=10`

`b,  x - 96 = ( 443 - x ) - 15`

`x-96=443-x-15`

` x+x=443-15+96`

`2x=524`

`x=524:2`

`x= 262`

Vậy `x=262`

\(#Nqoc\)

`a)`

\([ ( 2 \times x - 11 ) \div 3 + 1 ] \times 5 = 20\)

`(2 \times x - 11) \div 3 + 1 = 20 \div 5`

`(2 \times x - 11) \div 3 + 1 = 4`

`(2 \times x - 11) \div 3 = 4  - 1`

`(2 \times x - 11) \div 3 = 3`

`2 \times x - 11 = 3 \times 3`

`2 \times x - 11 = 9`

`2 \times x = 9 + 11`

`2 \times x = 20`

`x = 20 \div 2`

`x = 10`

Vậy, `x = 10`

`b)`

\(x - 96 = ( 443 - x ) - 15\)

`x - 96 = 443 - x - 15`

`x - 96 = 428 - x`

`x = 428 - x + 96`

`x = 524 - x`

`x - 524 + x = 0`

`(x + x) - 524 = 0`

`2x - 524 = 0`

`2x = 524`

`x = 524 \div 2`

`x = 262`

Vậy, `x = 262.` 

Ta có :

a)|2x-2|-3x+1=-2

|2x-2|-3x=-3

|2x-2|=3x-3

Để biểu thức trên có nghĩa thì 3x-3>0 hoặc=0.Khi đó x>1 hoặc =1

TH1:2x-2=3x-3

2x-3x=-3+2

x=1 (Thỏa mãn)

TH2:2x-2=-(3x-3)

2x-2=-3x+3

2x+3x=3+2

5x=5

x=1(Thỏa mãn)

Vậy x=1

b)x-96=(443-x)-15

x-96=443-x-15

x+x=443-15+96

2x=524

x=262

<=> x - 96 = 443 - x - 15

<=> x + x  = 443 - 15 + 96

<=>   2x   = 524

<=>   x     = 524 : 2

<=>  x      = 262

\(x-96=\left(443-x\right)-15\)

\(x-96=443-x-15\)

\(x+x==443-15+96\)

           \(x.2=524\)

               \(x=524:2\)

               \(x=262\)

Tk mk nhé(nếu đúng)!Thank you!

mình chịu

a) x - 96 = (443 - x) - 15

x - 96 = 443 - x - 15

x + x = 443 -15 + 96

2x = 524

x = 524 : 2

x = 262

b) (x  -12) - 15 = (20 - 7) - (18 + x)

x - 12 - 15 = 20 - 7 - 18 - x

x + x = 20 - 7 - 18 + 12 + 15

2x = 22

x = 22 : 2

x = 11

c) 311 - x + 82 = 46 + (x - 21)

311 - x + 82 = 46 + x - 21

-x - x = 46 - 21 - 311 - 81

-2x = -367

x = -367 : (-2)

x = 183,5

d) -(x - 3 + 85) = (x + 70 - 71) - 5

-x + 3 - 85 = x + 70 - 71 - 5

-x - x = 70 - 71 - 5 - 3 + 85

-2x = 76

x = 76 : (-2)

x = -38

e,f làm tương tự

a) x - 96 = (443 - x) - 15

x - 96 = 443 - x - 15

x + x = 443 -15 + 96

2x = 524

x = 524 : 2

x = 262

b) (x  -12) - 15 = (20 - 7) - (18 + x)

x - 12 - 15 = 20 - 7 - 18 - x

x + x = 20 - 7 - 18 + 12 + 15

2x = 22

x = 22 : 2

x = 11

c) 311 - x + 82 = 46 + (x - 21)

311 - x + 82 = 46 + x - 21

-x - x = 46 - 21 - 311 - 81

-2x = -367

x = -367 : (-2)

x = 183,5

d) -(x - 3 + 85) = (x + 70 - 71) - 5

-x + 3 - 85 = x + 70 - 71 - 5

-x - x = 70 - 71 - 5 - 3 + 85

-2x = 76

x = 76 : (-2)

x = -38

e,f làm tương tự

a) x - 96 = (443 - x) - 15

x - 96 = 443 - x - 15

x + x = 443 -15 + 96

2x = 524

x = 524 : 2

x = 262

b) (x  -12) - 15 = (20 - 7) - (18 + x)

x - 12 - 15 = 20 - 7 - 18 - x

x + x = 20 - 7 - 18 + 12 + 15

2x = 22

x = 22 : 2

x = 11

c) 311 - x + 82 = 46 + (x - 21)

311 - x + 82 = 46 + x - 21

-x - x = 46 - 21 - 311 - 81

-2x = -367

x = -367 : (-2)

x = 183,5

d) -(x - 3 + 85) = (x + 70 - 71) - 5

-x + 3 - 85 = x + 70 - 71 - 5

-x - x = 70 - 71 - 5 - 3 + 85

-2x = 76

x = 76 : (-2)

x = -38

e,f làm tương tự