SOLUTION: John bought 75 stamps for 19.94. Some were 20 cent stamps and some were 33 cent stamps. How many of each kind did he buy?
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Question 609642: John bought 75 stamps for 19.94. Some were 20 cent stamps and some were 33 cent stamps. How many of each kind did he buy?
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
Let x be the number of 20 cent stamps bought.
.20x+.33(75-x)=19.94
.2x+24.75-.33x=19.94
-.13x+24.75=19.94
-.13x=-4.81
x=37
75-37=38 (33 cent stamps)
.
Ed
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