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anonymous

  • 5 years ago

postman sold some 15 cent stamps and some 25 cent stamps. 10 stamps total were sold for $1.70. How many of each were sold?

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  1. radar
    • 5 years ago
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    Let x = the number of 15 cent stamps sold then 10 - x = number of 25 cent stamp sold The total sold came to $1.70 15x + 25(10-x)=1.70 15x+250-25x=1.70 -10x=170-250-30 -10x=-80 x=8 15 cent stamps 10-8=2 25 cent stamps. $1.20 + .50 =$1.70

  2. radar
    • 5 years ago
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    typo * -10x=170-250=80

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