6 (- 2 x )=- 5 2x 4
- 3 2x 4 )= 6 2 x 5
- 5 x 2 )- 6 x 1 )= 3 2x 4
- 6 x 3 )+ 4x 5 2x 4 )- 2
- 10/ x 2 5 / 2x - 4 1 / 6 - 3x
- 6 2x 5 )- 4 x 2 )= 14
- 3x 5 x 2 6 2x 5 4
- 2 2x 5 )= 4x 6 x
- 2 x 5 )- 10 ≥ 4 2x 6 )- 1
- X 1 2 2x 6 5 2x 4
- 2 x 5 )- 3 2x 8 )= 16 6 4x 3
- 5 x 2 )+ 6 4 2x 7
- X 5 2x 4 8x 2 13x 6
- 10 x 2 5 2x 4 và 1 6 3x
- 2x 5 )-( 5x 4 )= 6 2 x 3