Respuesta :
Sounds like Tracy is averaging three photos a day so she would take 21 in seven days
p=pictures
d=days of vacation
12p=4d
divide both sides by 4 to get
3p=d
3pictures every day
21p=_d, 21/3=7
7 days!
d=days of vacation
12p=4d
divide both sides by 4 to get
3p=d
3pictures every day
21p=_d, 21/3=7
7 days!