Respostas

2013-12-17T19:54:06-02:00
 a) y = x - 6
x - 6 = 0
x = 0 + 6
x = 6

b) y = - x - 4
- x - 4 = 0
- x = 0 + 4
- x = 4
x = - 4

c) y = - x + 10              
- x + 10 = 0
- x = 0 - 10
- x = - 10
x = 10
2013-12-17T20:00:06-02:00