Answer: 161 packages of gift wrap and the 44 packages of greeting cards
Explanation:
We are told the class sells 205 packages in total of gift wraps and greting cards:
(1)
Where
is the number of packages of gift wrap and
is the number of packages of greeting cards.
In addition, we are told the class receives a total of
selling each package of gift wrap for
and each package of greeting cards for
:
(2)
Isolating
from (1):
(3)
Substituting (3) in (2):
(4)
Finding
:
(5) This is the number of packages of greeting cards
Substituting (5) in (1):
(6)
Isolating
:
This is the number of packages of gift wrap