Posted by **betty** on Thursday, February 1, 2007 at 9:02pm.

suppose you bought some 32 cent stamps and some 20 cent stamps. you spent $3.92 for 16 stamps. how many of each stamp did you buy?

x = number of 32 cent stamps

y = number of 20 cent stamps

==================

x+y = 16

0.32x + 0.20y = 3.92

solve for x and y.

Check my thinking.

x + 20y = 12.25

i don't understand how to get the numbers for x and y

help please

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