A university bookstore recently sold a wirebound graph-paper notebook for $1.10, and a college-ruled notebook for $3.16. At the start of spring semester, a combination of 50 of these notebooks were sold for a total of $102.38. How many of each type were sold?

Question

anonymous · Answer

x=college-rule y=wirebound
3.16x+1.10y=102.38
x+y=50
y=50-x
3.16x+1.10(50-x)=102.38
3.16x+55-1.10x=102.38
2.06x=47.38
x=23 college ruled
23+y=50
y=27 wirebound

anonymous · Answer

basically set up 2 equations and substitute one in the other.

amistre64 · Answer

wirebound graph-paper $1.10
college-ruled notebook   $3.16.

50 sold for a total of $102.38. How many of each type were sold?

amount @ 3.16 = (102.38 - 50(1.10))/(3.19-1.10)

amistre64 · Answer

adjust for typos

amistre64 · Answer

23 @ 3.16

27 @ 1.10

is what i get; but dbl chk