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This problem looking at mixtures of ground beef.
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Both the premiums 310 a pound.
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The lower is 205 a pound, and this mixture is 268 a pound.
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We also know that we bought 8 pounds of the lower quality.
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We want to figure out how much of the premium was bought.
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So i'm going to let this be x.
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So premium was bought 310 to pound, x pounds of it.
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That's what we're selling for.
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The lower was 205, 8 pounds are bought.
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The mixture is $268 a pound, and how many pounds are bought is the sum of both of them.
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So you have x plus 8.
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Okay.
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Now, let's think about the amount of money.
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Let's think about the amount of money that we spent.
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So how much money in total was spent? well, 310 a pound times x would be $3 .10 .3 .10.
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$3 .10 .x.
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And multiply these together.
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So the second one, we can do the math, 205 times 8.
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$16 .40.
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And if we come down here, we would have 2 .68 times x plus 8.
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So we only bought premium lower.
01:24
So this number plus this one should equal that.
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Let's set up an equation that says...