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How many pounds of coffee worth 10 a pound should be added to 30 pounds of coffee worth 4 a pound to get a mixture worth 6 a pound?
Wiki User
∙ 8y ago
Let x = pounds at 10/lb and Y = 30 pounds at 4/lb and Z = 30 +x = total pounds at 6/lb;
then 10X + 4Y = 6Z
solve for x
10x + 120 = 180 + 6x
x = 15 pounds
Wiki User
∙ 8y ago
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