Problem: How many packages have been delivered ?
At work one day, Erica Franz received 7 packages.
Speedy delivery delivered twice as many as Ralph's Express,
while Ralph's Express delivered one more package
than SendQuick package service. how many packages did each deliver ?
s = 2r
r = q + 1
s = 2(q + 1)
s = 2q + 2
s + r + q = 7
(2q + 2) + (q + 1) + q = 7
4q + 3 = 7
4q = 4
q = 1
r = q + 1 = 1 + 1 = 2
s = 2r = 2 * 2 = 4
Speedy Delivery delivered 4
Ralph's Express delivered 2
SendQuick Package Service delivered 1