| 1) | 2x -6y + 4 x + 4y | 2) | 7x -6y -4 x + 3y |
| 3) | 3x -4y -5 x + 8y | 4) | 3x -8y + 7 x + 9y |
| 5) | 9x -7y + 6 x + 8y | 6) | 9x -10y -2 x + 2y |
| 7) | 12x -10y + 2 x + 6y | 8) | 7x -8y + 8 x + 3y |
| 9) | 8x -6y - x + 9y | 10) | 4x -7y -3 x + 5y |
| 11) | 6x -8y + 8 x + 7y | 12) | 8x -5y -5 x + 5y |
| 13) | 11x -6y + 4 x + 2y | 14) | 10x -5y -4 x + 3y |
| 15) | 8x -7y -2 x + 6y | 16) | 10x -10y - x + 9y |
| 17) | 9x -7y -4 x + 8y | 18) | 8x -6y -6 x + 9y |
| 19) | 12x -7y + 2 x + 9y | 20) | 10x -10y + 2 x + 2y |
| 21) | 4x -10y - x + 4y | 22) | 7x -9y -6 x + 7y |
| 23) | 10x -10y + 11 x + 3y | 24) | 9x -9y + 12 x + 7y |
| 25) | 3x -9y -4 x + 2y | 26) | 6x -4y + 12 x + 2y |
| 27) | 5x -4y + 9 x + 5y | 28) | 9x -9y + 12 x + 8y |
| 29) | 5x -9y + 4 x + 2y | 30) | 12x -10y -3 x + 4y |
| 31) | 8x -6y -2 x + 2y | 32) | 10x -8y -2 x + 3y |
| 33) | 7x -10y + 3 x + 3y | 34) | 12x -5y -6 x + 9y |
| 35) | 12x -7y + 7 x + 2y | 36) | 7x -8y + 2 x + 4y |
| 37) | 10x -7y -5 x + 3y | 38) | 7x -9y + 3 x + 8y |
| 39) | 12x -5y + x + 9y | 40) | 2x -10y -3 x + 5y |
Joke:
If your friend says education is expensive, ask him to try ignorance!