Question

Tìm x , chuyển vế câu a hoặc câu b  rồi tính :

a)8x-75=5x+21

b)9x+25=-(2x-58)

 

Answer 1

a) 8x - 75 = 5x +21

  8x - 5x = 21 + 75

 3x = 96

x =32

b) 9x + 25 = -2x + 58

   9x + 2x = 58 - 25

  11x = 33

  x =3

Answer 2

a) 8x - 75 = 5x + 21

8x - 5x = 21 + 75

3x = 96

x = 96 : 3 = 32

b) 9x + 25 = - ( 2x - 58 )

9x + 25 = -2x + 58

9x + 2x = 58 - 25

11x = 33

x = 33 : 11 = 3

Answer 3

a, 8x-75=5x+21

8x-5x=21+75

3x=96

x=32

b,9x+25=-(2x-58)

9x+25=-2x+58

9x+2x=58-25

11x=33

x=3

Answer 4

a)8x-75=5x+21

8x-5x=21+75

(8-5)x=96

3x =96

x =96:3

x =32

Answer 5

a) 8x - 75 = 5x + 21

8x -5x = 75 + 21

(8 -5 )x= 96

3x =96

x = 96 :3 =32