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March 25, 2017

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How many pounds of hamburger that costs $1.60 per pound must be mixed with 70 pounds of hamburger that costs $2.10 per pound to make a mixture that costs $1.70 per pound.

  • math - ,

    let x lbs be added

    then

    1.6x + 2.1(70) = 1.7(x+70), solve

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