Math
posted by Tory Smith .
A university bookstore recently sold a wirebound graphpaper notebook for $2.64, and a collegeruled notebook for $3.61. At the start of spring semester, a combination of 50 of these notebooks were sold for a total of $168.86. How many of each type were sold?

x = number of graph notebooks
y = number of college ruled notebooks
2.64x = total value sold graph notebooks
3.61y = total value sold college notebooks
x + y = 50
2.64x + 3.61y = 168.86
Solve these 2 equations together by elimination or substitution method
I will use substitution method
x + y = 50
x = 50  y
2.64x + 3.61y = 168.86
2.64(50  y) + 3.61y = 168.86
132  2.64y + 3.61y = 168.86
132 + .97y = 168.86
.97y = 36.86
y = 38
substitute y = 38 in x + y = 50, to find x
x + 38 = 50
x = 12
12 graph notebooks were sold
38 college ruled notebooks were sold
Respond to this Question
Similar Questions

algebra
A university bookstore recently sold a wirebound graphpaper notebook for $2.64, and a collegeruled notebook for $3.61. At the start of spring semester, a combination of 50 of these notebooks were sold for a total of $168.86. How … 
algebra
A university bookstore recently sold a wirebound graphpaper notebook for $0.88, and a collegeruled notebook for $2.38. At the start of spring semester, a combination of 50 of these notebooks were sold for a total of $59.00. How many … 
intermediate algebra
A university bookstore recently sold a wirebound graphpaper notebook for $2.15, and a collegeruled notebook for $3.43. At the start of spring semester, a combination of 50 of these notebooks were sold for a total of $134.38. How … 
Algebra
A university bookstore recently sold a wirebound graph paper notebook for $1.08, and a college ruled notebook for $3.12.At the start of the spring semester, a combination of 50 of these notebooks were sold for a total of $88.68 .How … 
ALGEBRA
SOLVE IN LINEAR EQUATION? A university bookstore recently sold a wirebound graph paper notebook for $1.08, and a college ruled notebook for $3.12.At the start of the spring semester, a combination of 50 of these notebooks were sold 
math
Shop A sold a notebook for $1200. This was 125% of the price of a similar notebook sold in Shop B. Find the price of the notebook in Shop B. During a sale, both shops gave the same percentage of discount. Dennis bought the notebook … 
algebra
An office supply store sells pens for $3 and notebooks for $5. Before school started, the store sold 12 more pens than notebooks and made $324. Which system of equations could be used to find the number of pens, p, and notebook, n … 
Math
The school store opened on the first day of scroll with 56 notebook and 24 pencils. Within two days it sold all of these items. On the first day, twice as many notebooks were souls as pencils. On the second day for every 5 notebooks … 
Math
The school store opened on the first day of scroll with 56 notebook and 24 pencils. Within two days it sold all of these items. On the first day, twice as many notebooks were souls as pencils. On the second day for every 5 notebooks … 
math
to get ready for her 1 semester of school, brie spent a total of 7.92 dollars for eight identical notebooks. what was the cost of each notebook?