| 1) | 11x -6y + 8 x + 4y | 2) | 6x -9y + x + 8y |
| 3) | 2x -7y - x + 7y | 4) | 12x -9y + 10 x + 4y |
| 5) | 4x -10y + 10 x + 6y | 6) | 7x -6y + 7 x + 7y |
| 7) | 8x -4y - x + 8y | 8) | 4x -9y -6 x + 5y |
| 9) | 9x -8y + 2 x + 4y | 10) | 11x -7y -3 x + 6y |
| 11) | 12x -7y + 11 x + 3y | 12) | 6x -7y -5 x + 2y |
| 13) | 11x -4y + x + 2y | 14) | 10x -7y + 8 x + 9y |
| 15) | 11x -9y + 8 x + 4y | 16) | 11x -9y -5 x + 4y |
| 17) | 5x -9y -6 x + 5y | 18) | 4x -10y - x + 6y |
| 19) | 3x -8y + 12 x + 6y | 20) | 6x -9y + 12 x + 5y |
| 21) | 3x -5y -5 x + 2y | 22) | 12x -8y -2 x + 5y |
| 23) | 4x -4y -4 x + 9y | 24) | 4x -5y + 4 x + 9y |
| 25) | 7x -9y -4 x + 8y | 26) | 2x -10y -4 x + 9y |
| 27) | 10x -6y + 5 x + 7y | 28) | 2x -5y + 2 x + 4y |
| 29) | 9x -8y + 3 x + 9y | 30) | 4x -10y + 4 x + 2y |
| 31) | 7x -5y + 7 x + 5y | 32) | 7x -6y + 7 x + 6y |
| 33) | 4x -9y -2 x + 3y | 34) | 11x -9y -2 x + 3y |
| 35) | 6x -5y + 4 x + 8y | 36) | 9x -4y + 2 x + 9y |
| 37) | 12x -4y + 11 x + 3y | 38) | 7x -10y + x + 9y |
| 39) | 12x -10y + 4 x + 2y | 40) | 11x -6y -2 x + 7y |
Joke:
After attending the Sunday School, Little Adam refuses to work out 23 - 14, saying he does not want to live in debt!