Question

[ ( 4 . x - 72) : 2 - 84] . 28 = 56

Answer 1

[(4.x-72):2-84].28=65

[(4.x-72):2-84]=2

[(4x-72):2=86

(4.x-72)=172

4x=344

x=86

Answer 2

[ ( 4 . x - 72 ) : 2 - 84 ] . 28 = 56

[ ( 4 . x - 72 ) : 2 - 84 ] = 2

( 4 . x - 72 ) : 2 - 84 = 2

( 4 . x - 72 ) : 2 = 86

4 . x - 72 = 172

4 . x = 244

      x = 61

Answer 3

[ ( 4 . x - 72 ) : 2 - 84 ] . 28 = 56

[ ( 4 . x - 72 ) : 2 - 84 ] = 2

( 4 . x - 72 ) : 2 - 84 = 2

( 4 . x - 72 ) : 2 = 86

4 . x - 72 = 172

4 . x = 244

      x = 244 : 4

       x = 61

Answer 4

x=61

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Answer 5

61 nha

Answer 6

[ ( 4 . x - 72) : 2 - 84] . 28 = 56

=>[(4.x - 72) :2 - 84]= 56:28

=>(4.x - 72) :2 - 84=2

(4.x - 72) :2=2+84

(4.x -72) :2=86

(4.x -72)=86*2

4.x -72=172

4.x=172+72

4.x=244

   x=244:4

    x=61

Answer 7

Số cần tìm :

x = 61

Lời giải:...

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