Let the no of large frames bought be X
Then the no of smaller frames bought will be (17 - X )
Cost incurred = 14X + 5( 17 - X) = 130
14X + 85 - 5X = 130
9X = 45
X = 5
Answer 5 large frames and 12 small frames
Check
5X14 = 70
12X5 = 60
ADD = 130$