Answer:
The number of portrait sheet is 2
See attachment
Step-by-step explanation:
if x is the number of portrait sheet
Tran Photography: f(x) = 10x + 60
Lasting Memories: g(x) = 5x + 70
If the cost is the same
f(x) = g(x)
10x + 60 = 5x + 70
10x - 5x = 70 - 60
5x = 10
x = 2
