Resposta :
| x y 1 |
| 4 3 1 | = 0
| -3 -2 1 | 3x-3y-8+9-4y+2x=0
5x -7y +1 = 0
7y = 5x + 1
y = 7/7 x + 1/7
| x y 1 |
| 1 4 1 | =0
| -3 0 1 | 4x-3y+12-y=0
4x-4y+12=0
x -y + 3 =0
y = x + 3
| x y 1 |
| 0 6 1 | = 0
| 7 0 1 | 6x+7y-42=0
7y = -6x + 42
y = -6/7 x +6
| 4 3 1 | = 0
| -3 -2 1 | 3x-3y-8+9-4y+2x=0
5x -7y +1 = 0
7y = 5x + 1
y = 7/7 x + 1/7
| x y 1 |
| 1 4 1 | =0
| -3 0 1 | 4x-3y+12-y=0
4x-4y+12=0
x -y + 3 =0
y = x + 3
| x y 1 |
| 0 6 1 | = 0
| 7 0 1 | 6x+7y-42=0
7y = -6x + 42
y = -6/7 x +6