algebra

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Allen bought 20 stamps at the post office in 37 cents and 20 cents. the total cost of the stamp was $7.06. How many 37cents stamp did Allen Buy

  • algebra -

    Let x be the number of 37 cent stamps; this means that 20-x will be the number of 20 cent stamps.
    0.37 x + (0.20)(20-x)= 7.06 (total dollar value)
    0.17 x + 4 = 7.06
    0.17 x = 3.06
    x = ?

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