2 3 1 52 3 6 1  2X X X2 5 2 5 2  D

Bài 1: Tìm x, biết:

x  x  x 

a. 8x – 3 = 5x + 12 b. 2x – x

= 0 c. 2 3 1 5

2 3 6 1

  

x x x

2 5 2 5 2

 

 

d.2x(x – 3) + 5(x – 3) = 0 e.

1 1

1 ( 3)

 

 

3 1 3 1 9 1

2 x 9 x

   f.

 