<PRE><B>Question 553978</B>
A university bookstore recently sold a wirebound graph-paper notebook for $1.64, and a college-ruled notebook for $1.17. At the start of spring semester, a combination of 50 of these notebooks were sold for a total of $66.02. How many of each type were sold?
**
let x=number of $1.64 notebooks sold
let (50-x)=number of $1.17 notebooks sold
..
1.64x+1.17(50-x)=66.02
1.64x+58.50-1.17x=66.02
.47x=7.52
x=16
50-x=34
ans:
number of $1.64 notebooks sold=16
number of $1.17 notebooks sold=34</PRE>