[(6x-72):2-84]×28=5628

⇔x=107 .... 

Vậy x=107

\([(6x-72):2-84].28=5628\)

\((6x-72):2-84=5628:28\)

\((6x-72):2-84=201\)

\((6x-72):2=201+84\)

\((6x-72):2=285\)

\(6x-72=285.2\)

\(6x-72=570\)

\(6x=570+72\)

\(6x=642\)

\(x=642:6\)

\(x=107\)

x=107

[(6x - 72 ) : 2 - 84 ] . 28 = 5628

 ( 6x - 72 ) : 2 - 84  = 5628 : 28

 ( 6x - 72 ) : 2 - 84  = 201

( 6x - 72 ) : 2 = 201 + 84

( 6x - 72 ) : 2 = 285

6x - 72 = 285 x 2

6x - 72 = 570

6x = 570 + 72

6x = 642

x = 642 : 6

x = 107

Bạn viết đề sai rồi nha Đoàn Thị Ngọc Hiền, Tớ sẽ chữa lại đề cho cậu nhé:        

\(\left[\left(6x-72\right):2-84\right].28=5628\)

        \(\left[\left(6x-72\right):2-84\right]=5628:28\)

        \(\left[\left(6x-72\right):2-84\right]=201\)

           \(\left(6x-72\right):2-84=201\)

                        \(\left(6x-72\right):2=201+84\)

                        \(\left(6x-72\right):2=285\)

                                \(\left(6x-72\right)=285.2\)

                                 \(\left(6x-72\right)=570\)

                                      \(6x-72=570\)

                                                  \(6x=570+72\)

                                                  \(6x=642\)

                                                     \(x=642:6=107\)

[ ( 6x - 72 ) : 2 - 84 ] 28 = 5628

[ ( 6x - 72 ) : 2 - 84 ] = 5628 : 28

[ ( 6x - 72 ) : 2 - 84 ] = 201

  ( 6x - 72 ) : 2 = 201 + 84

  ( 6x - 72 ) : 2 = 285

    6x - 72 = 285 x 2

    6x - 72 = 570

    6x = 570 + 72

    6x = 642

      x = 642 : 6

      x = 107

6x-72 : 2-84.28=5628

=> 6x-36-2352= 5628

=> 6x= 36+2352+5629

=> 6x=8016

=> x=1336

=> 

TL:

\(6x-36-2352=5658\) 

\(6x-2388=5658\) 

\(6x=8046\) 

\(x=1341\) 

Vậy x=1341

#)Giải :

\(6x-72\div1-84.28=5628\)

\(\Leftrightarrow6x-36-2352=5628\)

\(\Leftrightarrow6x-36=7980\)

\(\Leftrightarrow6x=8016\)

\(\Leftrightarrow x=1336\)

[(6x-72) : 2-84].28=5628

[(6x-72) :2-84] =5628:28=201

(6x-72):2 = 201+84=285

6x-72 =285.2=570

6x =570+72=642

x =642:6= 107

[(6x-72):2-84] .28=5628

[(6x-72):2-84]=5628:28

[(6x-72):2-84]=201

[(6x-72):2]=201+84

[(6x-72):2]=285

6x-72=285.2

6x-72=570

6x=570+72

6x=642

x=624:6

x=104

Vậy x=104

giùm mk nha bạn!!!!

\(\left[\left(6x-72\right):2-84\right].28=5628\)

\(\Rightarrow\left(6x-72\right):2-84=201\)

\(\Rightarrow\left(6x-72\right):2=285\)

\(\Rightarrow6x-72=570\)

\(\Rightarrow6x=642\)

\(\Rightarrow x=107\)

vậy x = 107

Chúc pn hk tốt ^-^

bạn có chắc rằng toán lớp 1 ko

day ma la toan lop 1 a?

[{6x-72}:2 -84].28=5628 

\(\Rightarrow\)(6x-72):2 -84=5628:28

\(\Rightarrow\)(6x-72):2 -84=201

\(\Rightarrow\)(6x-72):2 =201+84

...

Cách đặt dấu ngoặc sai rồi bn ơi

\(\left[\left(6x-72\right):2-84\right]\cdot28=5628\)

\(\left(6x-72\right):2-84=5628:28\)

\(\left(6x-72\right):2-84=201\)

\(\left(6x-72\right):2=201+84\)

\(\left(6x-72\right):2=285\)

\(6x-72=285\cdot2\)

\(6x-72=570\)

\(6x=570+72\)

\(6x=642\)

\(x=642:6\)

\(x=107\)

Vậy \(x=107\)

(6x-72) : 2 - 84 = 5628:28

(6x-72):2-84= 201

(6x -72):2= 201+84

(6x-72):2= 285

6x-72=285x2

6x-72=570

6x= 570+72

6x= 642

x=642:6

x= 107

[ ( 6x - 72 ) : 2 - 84 ] . 28 = 5628

=> ( 6x - 72 ) : 2 = 201

=>  6x - 72 = 402

=> 6x = 474

=> x = 79

[(6x − 72) : 2 − 84] . 28 = 5628

(6x – 72) : 2 – 84 = 5628 : 28

( 6x – 72) : 2 – 84 = 201

(6x – 72) : 2 = 201 + 84

( 6x – 72) : 2 = 285

6x – 72 = 285.2

6x – 72 = 570

6x = 570 + 72

6x = 642

x = 642 : 6

x = 107

Vậy x = 107