SOLUTION: A postal-clerk sold some 20-cent stamps and some 28-cent stamps. Altogether 160 stamps were sold for a total of 40.80. How many 28 cent stamps were sold?
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Question 623965: A postal-clerk sold some 20-cent stamps and some 28-cent stamps. Altogether 160 stamps were sold for a total of 40.80. How many 28 cent stamps were sold? Answer by ewatrrr(24785) (Show Source):
Hi
A postal-clerk sold some 20-cent stamps and some 28-cent stamps.
Altogether stamps were sold for a total of $40.80
How many 28 cent stamps were sold?
Question states*** CENTS makes sense
28x + 20(160-x) = 4080¢ |Solve for x