SOLUTION: Scott uses 43-cent stamps and 8-cent stamps to mail a CD to a friend. If the postage is $2.44, how many of each stamp did Scott use?

Question 1007840: Scott uses 43-cent stamps and 8-cent stamps to mail a CD to a friend. If the postage is $2.44, how many of each stamp did Scott use?
Answer by ikleyn(52884) (Show Source): You can put this solution on YOUR website!
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Scott uses 43-cent stamps and 8-cent stamps to mail a CD to a friend.
If the postage is $2.44, how many of each stamp did Scott use?
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This formulation was intently made not precisely right to miss the student.
The right formulation is: How many of each stamp should Scott use to pay exactly $2.44 for mail?


Scott can not use only 8-cent stamps, because 244 is not multiple of 8.

Scott can not use only one 43-cent stamp, because then 244-43 is not multiple of 8.

Scott can not use only two 43-cent stamps, because then 244-2*43 is not multiple of 8.

Scott can not use only three 43-cent stamps, because then 244-3*43 is not multiple of 8.

Scott can use four 43-cent stamps and  =  9 (nine) 8-cent stamps.

Indeed, 4*43 + 9*8 = 244 cents.

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