2 x 4 7 2x 1
- 2 x 7 )- 3 2x 4 )=- 18
- 2 3x 7 )-( x 2 )=- 4 2x 11 )+ 3x
- 2 4 2x 7 1 7 )= 3 2 x
- 1 2 x 6 2x 7 )- 4
- 2 2x 1 7 * 2 x 4 0
- 2x 7 x 2 3x 4 1
- 13x 5 x 2 )= 4 2x 1 )+ 7
- 4 x 2 7 8x 3 2x /- 10
- 2 x 7 4 2x 5 12
- X 3 4 2x 7 12 2
- 2 2x 4 )- 7 5 x 1
- 14x 2 x 5 4 2x 7
- 4 x 7 )+ 2x 2 3x 13 )- 2
- 7 2 2x ) 4 (- x 10
- 5x 10 x 2 7 2x 4