math
posted by bashi .
a coffee company wants a new flavor of cajun coffee. how many pounds of coffee worth $10 a pound should be added to 20 pounds of coffee worth $3 a pound to get mixture worth $6 a pound

amount to be added  x lbs
10x + 3(20) = 6(x+20)
10x + 60 = 6x + 120
4x = 60
x = 15
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