SOLUTION: Please help. Ink Remover. Etch Clean Graphics uses one cleanser that is 25% acid and a second that is 50% acid. How many liters of each should be mixed to get 30L of a solution t

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Question 744886: Please help. Ink Remover. Etch Clean Graphics uses one cleanser that is 25% acid and a second that is 50% acid. How many liters of each should be mixed to get 30L of a solution that is 40% acid?
Every time I do it I get a different answer.Please, show how you did it.

Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

Please help. Ink Remover. Etch Clean Graphics uses one cleanser that is 25% acid and a second that is 50% acid. How many liters of each should be mixed to get 30L of a solution that is 40% acid?
Every time I do it I get a different answer.Please, show how you did it.

Let the amount of 25% acid to be mixed, be T
Then amount of 50% acid to be mixed = 30 – T
Therefore, .25T + .5(30 – T) = .4(30)
.25T + 15 - .5T = 12
.25T - .5T = 12 – 15
- .25T = - 3
T, or amount of 25% acid to be mixed = , or

Amount of 50% acid to be mixed = 30 – 12, or

You can do the check!!

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