Resposta :
Oieee
Bom,
__________
A)
y = x + 7 = 0
x = -7
R) x = -7
_
B)
y = 2x + 4 = 0
x + 2 = 0
x = -2
R) x = -2
_
C)
y = -2x + 6 = 0
2x - 6 = 0
x - 3 = 0
x = 3
R) x = 3
_
D)
y = -3x + 9 = 0
3x - 9 = 0
x - 3 = 0
x = 3
R) x = 3
____________________
Qualquer dúvida me avise
A$$: MarcosPCV