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) About Me  (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