SOLUTION: At a store, ice cream cones cost $0.90 and sundaes cost $1.65. One day a total of 142 cones and sundaes were sold and the receipts totalled $173.55. How many cones were sold?

Question 1054791: At a store, ice cream cones cost $0.90 and sundaes cost $1.65. One day a total of 142 cones and sundaes were sold and the receipts totalled $173.55. How many cones were sold?
Answer by addingup(3677) (Show Source): You can put this solution on YOUR website!
c+s = 142 subtract s on both sides
s = 142-c we'll use this value for s below
:
0.90c+1.65s = 173.55 substitute for s
0.90c+1.65(142-c) = 173.55
0.90c+234.30-1.65c = 173.55
-0.75c = -60.75 divide both sides by -0.75, remember that -/- = +
c = 81 this is how many cones were sold.
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