SOLUTION: A university bookstore recently sold a wire bound graph-paper notebook for $2.50 and a college-ruled notebook for $2.30. At the start of spring semester, a combination of 50 of th

Question 142641: A university bookstore recently sold a wire bound graph-paper notebook for $2.50 and a college-ruled notebook for $2.30. At the start of spring semester, a combination of 50 of these notebooks was sold for a total of $118.60. How many of each type were sold?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
2.3X+2.5(50-X)=118.60
2.3X+125-2.5X=118.60
-.2X=118.60-125
-.2X=-6.4
X=-6.4/-.2
X=32 BOOKS SOLD FOR $2.30
50-32=18 BOOKS SOLD FOR $2.50
PROOF:
2.3*32+2.5*18=118.60
73.60+45=118.60
118.60=118.60
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