SOLUTION: Suppose you bought some 32c stamps and some 20c stamps. You spent $3.92 for 16 stamps. How many of each stamp did you buy?

Question 177481This question is from textbook
: Suppose you bought some 32c stamps and some 20c stamps. You spent $3.92 for 16 stamps. How many of each stamp did you buy? This question is from textbook

Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Let x be the number of 32 cent stamps and y be the number of 20 cent stamps. Then . The value of the 32 cent stamps is 32x and the value of the 20 cent stamps is 20y, and the total value of the stamps is 392 cents, so:

, but since we also know that and we can then say , we can substitute for x in the value equation:

Now all you need to do is solve the equation for y giving you the number of 20 cent stamps, and then subtract that value from 16 to get the number of 32 cent stamps.
RELATED QUESTIONS
suppose you bought some .32 cent stamps and some .20 cent stamps. You spent $3.92 for... (answered by rwm)

Purchase regular .37 stamps and also pick up some .40 stamps the number of .40 stamps was (answered by josmiceli)

Denise bought 50 postage stamps for which she paid $13.00. Some were 20-cent stamps and... (answered by checkley77)

John bought 75 stamps for 19.94. Some were 20 cent stamps and some were 33 cent stamps.... (answered by edjones)

Mrs. Smith bought some $0.20 stamps and an equal amount of $0.32 stamps. She paid a total (answered by CubeyThePenguin)

Hailie bought 30 stamps for $41.94. Some of them were $3.00 stamps and the rest were... (answered by addingup)

Allan bought some 5 cent stamps and some 20 cent stamps. The entire purchase was $7 he... (answered by oberobic)

Floyd bought 3 times as many 12 cent stamps as he did 10 cent stamps and 6 more 10 cent... (answered by KMST)

Can you show me Step-By-Step how to solve this problem? Luanne bought 50 stamps, some... (answered by scott8148)