Respuesta :
If you did 9 x 6 stamps you would only need 2 x 7 stamps and you would have 2 cents left over
If a package requires 66 cents to mail, the number of 7 cent stamps that will be needed is 3.
Based on the information given, we have to get a number that first into both stamps correctly.
The equation will be:
7x + 9y = 66
7(3) + 9(5)
21 + 45 = 66
Since the value that's is gotten equals 66 cents.
Therefore, 3 7cents stamps are required.
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