Using only 32 cents and 20 cent stamps Charlie put 3 dollars and 36 cents on a package he sent to his sister. He used 8- 32 cent stamps and 4-20 cent stamps.
Let x = Number of 20c stamps.
So, 2x = Number of 32c stamps.
20(x) + 32(2x) = 336
20x + 64x = 336
84x = 336
x = 4 (20c stamps)
2x = 8 (32c stamps).
Verify:
4 x 20 = 80 cents
8 x 32 = 256 cents
80+256 = $3.36.
Therefore, Charlie used 4 - 20 cent stamps and 8 - 32 cent stamps to sent the package to his sister.
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