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08-11-2017
Mathematics

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how many liters of a 79% solution must be added to 72 liters of a 34% solution to get a 63% solution

Respuesta :

08-11-2017

Let x=amount of the 79% solution.
0.79x+0.34×72=0.63(x+72)
0.79x+24.48=0.63x+45.36
0.16x=20.88, x=20.88/0.16=2088/16=130.5 litres.

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