Question

218-(x + 31) = x - 29

Tìm số nguyên x .

Answer 1

     \(218-\left(x+31\right)=x-29\)

\(\Leftrightarrow\)\(218-x-31=x-29\)

\(\Leftrightarrow\)\(187-x=x-29\)

\(\Leftrightarrow\)\(2x=216\)

\(\Leftrightarrow\)\(x=108\)

Vậy....

Answer 2

218-(x + 31) = x - 29

=> 218 - x - 31 = x - 29

=> (218-31) - x = x - 29

=> 187 - x = x - 29

=> -x - x = -29 - 187

=> -2x = -216

=> x = -216 : (-2)

=> x = 108

Answer 3

218 - ( x + 31 ) = x - 29

x + 31 + x - 29 = 218

2x + 2 = 218

2x = 218 - 2

2x = 216

  x = 216 : 2

  x = 108

Answer 4

Theo bài ra, ta có:

218 - ( x + 31 )  = x - 29

=> 218 - x - 31  = x - 29

=> 187 - x         = x - 29

=> x - ( 187 - x ) = 29

=> x - 187 + x    = 29

=> 2x - 187        = 29

=> 2x                = 29 + 187

=> 2x                = 216

=> x                  = 108

Answer 5

218-(x + 31) = x - 29

=> 218 - x - 31 = x - 29

=> (218-31) - x = x - 29

=> 187 - x = x - 29

=> -x - x = -29 - 187

=> -2x = -216

=> x = -216 : (-2)

=> x = 108

Hok tốt !

Answer 6

218 - ( x + 31 ) = x - 29

=> 218 - x - 31 = x - 29

=> ( 218 - 31 ) - x = x - 29

=> 187 - x = x - 29

=> -x - x = - 29 - 187

=> - 2x = - 216

=> x = -216 : ( - 2 )

=> x = 108