SOLUTION: a solution of 72% fertilizer is to be mixed with a 26% fertilizer to form 230 liters of a 53% solution. How many liters of the 72% solution must be used

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Question 1031486: a solution of 72% fertilizer is to be mixed with a 26% fertilizer to form 230 liters of a 53% solution. How many liters of the 72% solution must be used
Answer by stanbon(75887) About Me  (Show Source):
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a solution of 72% fertilizer is to be mixed with a 26% fertilizer to form 230 liters of a 53% solution. How many liters of the 72% solution must be used
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Quantity:: s + t = 230 liters
Fertilizer: 0.72s + 0.26t = 0.53*230
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Modify for elimination::
26s + 26t = 26*230
72s + 26t = 53*230
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Subtract and solve for "s"::
46s = 27*230
s = 135 liters (amt. of 72% solution needed)
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Cheers,
Stan H.
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