Problema Solution
Sales. Office Max® recently advertised a three-subject notebook for $2.49 and a five-subject notebook for $3.79. At the start of a recent spring semester, a combination of 50 of these notebooks was sold for a total of $166.10. How many of each type were sold?
Answer provided by our tutors
2.49 x + 3.79 y= 166.10
x+y=50
x=50-y
2.49(50-y) + 3.79y= 166.10
124.5 - 2.49y + 3.79y =166.10
124.5+1.3y=166.10
1.3y= 41.6
y=32
x=18