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Thread: How do you do this word problem

  1. #1
    courtney
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    How do you do this word problem

    Nineteen percent of the nitric acid was used in the experiment. If 1134 liters remained how much nitric acid had been available in the beginning? How much had been used?
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by courtney
    Nineteen percent of the nitric acid was used in the experiment. If 1134 liters remained how much nitric acid had been available in the beginning? How much had been used?
    Let $\displaystyle x$ denote the amount of nitric acid available at the
    begining. The $\displaystyle 19\%$ used is $\displaystyle 0.19x$ litres.

    So what is left is:

    $\displaystyle x-0.19x=1134$,

    so:

    $\displaystyle 0.81x=1134$

    Solving this gives:

    $\displaystyle x=1400$ litres.

    RonL
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