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