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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$