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Salt solutions of 60% and 15% are mixed to produce a 450-gallon mixture of 25% solution. How much of each solution is needed?

 Oct 4, 2017
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Call the amount at 60%  =  x

Call the amount at 15%  =  450 - x

 

So

 

.60x + .15(450 - x)  =  .25 (450)   simplify

 

.60x + 67.5  -  .15x =   112.5

 

.45x  =  45    divide both sides by .45

 

x = 100 gallons ......this is the amount at 60%

 

450 - x  =  450 - 100  =  350 gallons  = amount at 15%

 

 

cool cool cool

 Oct 4, 2017

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