Question

Tìm x :

a, (x - 12).105 = 0

b, 47.(27-x) = 47

c, 2x + 69.2 = 69 .4

d, 2x - 12 -x =0

 

Answer 1

a​, => x-12 = 0

 => x=12

b, => 27-x =1

=> x= 27-1 -26

c, => 2x = 69(4-2) =69.2

=> x=69

d, => x-12=0

=> x=12

Answer 2

a) (x - 12) . 105 = 0

=> x - 12 = 0

=> x = 12

b) 47 . (27 - x) = 47

=> 27 - x = 1

=> x = 27 - 1 = 26

c) 2x + 69 . 2 = 69 . 4

=> 2x = 69 . 4 - 69 . 2

=> 2x = 69 . (4 - 2) = 69 . 2

=> x = 69 . 2 : 2

=> x = 69

d) 2x - 12 - x = 0

=> x - 12 = 0

=> x = 12 

Answer 3

a ) ( x - 12 ) x 105 = 0

x - 12  = 0  : 105

x - 12 = 0

x = 0 + 12

x = 12

b ) 47 x ( 27 - x ) = 47

27 - x = 47 : 47

27 - x = 1

x = 27 - 1

x = 26

c ) 2x + 69 x 2 = 69 x 4

2x + 138 = 276

2x = 276 - 138

2x = 138

x = 138 : 2

x = 69

d ) 2x - 12 - x = 0

2x - x = 0 + 12

x = 12

Answer 4

Thanks nha mấy bạn

Answer 5

a) (x - 12) . 105 = 0

    (x- 12)          = 0:105

    ( x- 12)         = 0

    x                  = 0 + 12

    x                 = 12

B) 47. ( 27 - X ) = 47

          27 -  X    = 47 :47

          27 - X     = 1

               X       =27 - 1

                X       = 26

Answer 6

a, (x - 12) . 105 = 0

     x - 12 = 0 x 105

     x - 12 = 0

     x        = 0 + 12

     x        = 12

b, 47 . (27 - x) = 47

           27 - x = 47 : 47

           27 - x = 1

                  x = 27 - 1 

                  x = 6

c, 2x + 69 . 2 = 69 . 4

    2 . (x + 69) = 276

          x + 69 = 276 : 2

          x + 69 = 138

          x         = 138 - 69

          x         = 69

d, 2x - 12 - x = 0

    2x - x       = 0 + 12

    1x            = 12

=> x = 12

Answer 7

a, ( x -12 ) .105 = 0

    ( x - 12 )       = 0 : 105 

    ( x - 12 )       = 0

      x                = 0 + 12

      x                = 12

b, 47 . ( 27 - x ) = 47

       ( 27 - x ) = 47 : 47

       ( 27 - x ) = 1

               x   = 27 - 1

               x   = 26

c, 2x + 69.2 = 69.4

2x + 138  = 276

2x           = 276 - 138

2x           = 138

 x            = 138 : 2

 x            = 69

d, 2 .7 - 12 - 2 = 0

             

Answer 8

Ta có : 

a) (x - 12) . 105 = 0

=> x - 12 = 0

=> x = 12

b) 47 . (27 - x) = 47

=> 27 - x = 1

=> x = 27 - 1 = 26

c) 2x + 69 . 2 = 69 . 4

=> 2x = 69 . 4 - 69 . 2

=> 2x = 69 . (4 - 2) = 69 . 2

=> x = 69 . 2 : 2

=> x = 69

d) 2x - 12 - x = 0

=> x - 12 = 0

=> x = 12 

Answer 9

a) ( x - 12 ) x 105 = 0

( x - 12 ) = 0 : 105

( x - 12 ) = 0

 x = 0 + 12

x = 12

b) 47 x ( 27 - x ) = 47

   ( 27 - x ) = 47 : 47

   ( 27 - x ) = 1

    x = 27 - 1

   x = 26

c) 2x + 69.2 = 69.4

    2x + 138 = 276

    2x = 276 - 138

    2x = 138 

    x = 138 : 2

     x = 69

d) 2x - 12 - x = 0 

 x - 12 = 0

 2x - x = 0 + 12

x = 12

Answer 10

dap an la 12

Answer 11

a​, => x-12 = 0

 => x=12

b, => 27-x =1

=> x= 27-1 -26

c, => 2x = 69(4-2) =69.2

=> x=69

d, => x-12=0

=> x=12

Answer 12

a, x = 12

b, x = 26

c, x = 69

d, x = 12

Answer 13

a, (x - 12).105 = 0

=>x-12

=>x=0

b, 47.(27-x) = 47

=>27 - 1 =26

=> x=26

c, 2x + 69.2 = 69 .4

=>=> x -12 

x=0

Answer 14

Con m màu