Nadea spent $6 on pencils and $15 on notebooks. If pencils were $0.15 each and the notebooks were $1.25 each, how many of each item did she purchase?
Let x be the number of pencils Nadea bought.
The total cost of pencils is $0.15 * x = $0.15x.
The number of notebooks Nadea bought is 15 / 1.25 = <<15/1.25=12>>12 notebooks.
The total cost of the notebooks is $12 * 1.25 = $<<12*1.25=15>>15
The total cost is $6 + $15 = $<<6+15=21>>21
So, the total number of pencils and notebooks Nadea bought is x + 12 = 21 / 0.15 = <<21/0.15=140>>140
Therefore, Nadea bought x = 140 - 12 = <<140-12=128>>128 pencils. Answer: \boxed{128}.