Juan have to print 9 photos.
Explanation
Suppose, Juan have to print [tex]x[/tex] number of photos.
First photo shop charges $0.36 per print. So, the total cost to print [tex]x[/tex] number of photos in this shop [tex]=0.36x[/tex] dollar.
Second photo shop charges $2.52 plus $0.08 per print. So, the total cost for printing [tex]x[/tex] number of photos [tex]= (2.52+0.08x) dollar[/tex]
As, the cost of printing is the same at both shops, so.....
[tex]0.36x=2.52+0.08x\\ \\ 0.36x-0.08x= 2.52\\ \\ 0.28x=2.52\\ \\ x=\frac{2.52}{0.28}=9[/tex]
So, Juan have to print 9 photos.
