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Math Help - setting up a table and solving it.

  1. #1
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    Exclamation setting up a table and solving it.

    a 50-gallon barrel of milk is 6% butterfat. How much skim milk (no butterfat) should be mixed to make milk that is 3% butterfat?



    i am so confused.. please help.
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  2. #2
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    Hello, Heather!

    A 50-gallon barrel of milk is 6% butterfat.
    How much skim milk (no butterfat) should be mixed to make milk that is 3% butterfat?

    . . \begin{array}{|c|c|c|c|}<br />
& \text{gallons} & \text{Percent} & \text{butterfat} \\ \hline<br />
A & 50 & 6\% & 0.06(50) \\<br />
\text{skim} & x & 0\% & 0 \\ \hline<br />
\text{Mix} & x+50 & 3\% & 0.03(x+50) \end{array}


    Last column: . 3 + 0 \;=\;0.03(x+50)

    Go for it!

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