Asked by Connie Esquibel
You have two containers of acid solution. One is 30% acid. The other is a 50% acid solution. How much of each should be added to get a 45% acid solution?
Answers
Answered by
Steve
45 is 3/4 of the way from 30 to 50, so 3/4 of the mix will be 50%.
Or, more traditionally,
30x + 50y = 45(x+y)
30x + 50y = 45x + 45y
5y = 15x
y = 3x
So, there is 3 times as much 50% as 30%.
Or, more traditionally,
30x + 50y = 45(x+y)
30x + 50y = 45x + 45y
5y = 15x
y = 3x
So, there is 3 times as much 50% as 30%.
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