Ammon worked at least 12 hours.
Nakia worked at least 15 hours.
let a be the number of hours Ammon worked and n be the number of hours Nakia worked.
They are related by the equation:
n=3+a
The total number of hours worked is given by the inequaltiy
27 < n + a
to solve we must substitute n for 3+a
27 < 3 + a + a = 3+2a
27 < 3 + 2a
solving:
24 < 2a
12 < a
Ammon worked at least 12 hours
Nakia worked three more hours than Ammon so
Nakia worked at least 15 hours
