I’m sorry, but I don’t really know what P and W stand for, so I’m going to replace them
Yuki
y = 60x + 20
(total = 60 photos a week * x weeks + 20 starting photos)
Roman
y = 35x + 110
(total = 35 photos a week * x weeks + 110 starting photos)
So the system of equations for this problem is:
y = 60x + 20
y = 35x + 110