Question

Tìm x : 

a) 2012 : x + 23 = 526

c) (x - \(\frac{1}{2}\) ) x \(\frac{5}{2}\) + \(\frac{1}{2}\) = \(\frac{7}{4}\)

Ai trả lời chính xác mk cho 3 tk nghen!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

a) 2012 : x + 23 = 526

=> 2012 : x = 526 - 23 = 503

=> x = 2012 : 503 = 4

c) (x - 1/2) x 5/2 + 1/2 = 7/4

       (x - 1/2 ) x 5/2 = 7/4 - 1/2 = 5/4

=> x - 1/2 = 5/4 : 5/2 = 1/2

   => x = 1/2 + 1/2 = 1

=> x = 1

Answer 2

a, 2012 : x + 23 = 526

2012 : x = 526 - 23 

2012 : x = 503

x = 2012 : 503 

x = 4

b , ( x - 1/2 ) x 5/2 + 1/2 = 7/4

( x - 1/2 ) x 5/2 = 5/4

x - 1/2 = 5/4 : 5/2 

x -1/2 = 1/2

x = 1/2 + 1/2

x = 1

Answer 3

a, 2012 : x + 23 = 526

2012 : x = 526 - 23 

2012 : x = 503

x = 2012 : 503 

x = 4

b , ( x - 1/2 ) x 5/2 + 1/2 = 7/4

( x - 1/2 ) x 5/2 = 5/4

x - 1/2 = 5/4 : 5/2 

x -1/2 = 1/2

x = 1/2 + 1/2

x = 1

Answer 4

 a) 2012 : x + 23 = 526

2012 : x =256 - 23

2012 : x = 233

          x=2012 : 233

          x=2012/233

c) (x - 12  ) x 52  + 12  = 74 

( x -12 ) x 52 = 74 - 12

(x - 12 ) x 52 = 62

 x -12=62 : 52

x -12=31/26

x=31/26 + 12

x=343/26

Answer 5

a) 2012 : x + 23 = 526

    2012 : x         = 526 - 23

    2012 : x         = 503

              x         = 2012 : 503

              x         = 4

b)(x-1/2) x 5/2 + 1/2 = 7/4

   (x-1/2) x 5/2         = 7/4 -1/2

   (x-1/2) x 5/2         = 5/4

   (x-1/2)                 = 5/4 : 5/2

   (x-1/2)                 = 1/2

   x                        = 1/2 + 1/2

   x                        =  1