Question

a)[{6x-72}:2 -84].28=5628

 

Answer 1

[{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

...

Answer 2

Cách đặt dấu ngoặc sai rồi bn ơi

Answer 3

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

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

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

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

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

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

\(6x-72=570\)

\(6x=570+72\)

\(6x=642\)

\(x=642:6\)

\(x=107\)

Vậy \(x=107\)

Answer 4

[{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