SOLUTION: On a christmas package Audrey needs to use only 40-cent stamps and 16-cent stamps. If she uses twice as many 40-cent stamps as 16-cent stamps, how many of each type of stamp must s
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Question 154012: On a christmas package Audrey needs to use only 40-cent stamps and 16-cent stamps. If she uses twice as many 40-cent stamps as 16-cent stamps, how many of each type of stamp must she use to mail a package costing $5.76 in postage? Answer by checkley77(12844) (Show Source):
You can put this solution on YOUR website! .40*2x+.16x=5.76
.80x+.16x=5.76
.96x=5.76
x=5.76/.96
x=6 16 cent stamps used.
2*6=12 40 cent stamps used.
proof
.40*12+.16*6=5.76
4.8+.96=5.76
5.76=5.76
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