SOLUTION: How many liters of 10% saline solution must be added to 4 liters of 40% saline solution to get a 15% saline solution?

Question 291723: How many liters of 10% saline solution must be added to 4 liters of 40% saline solution to get a 15% saline solution?
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
How many liters of 10% saline solution must be added to 4 liters of 40% saline solution to get a 15% saline solution?
.
Let x = liters of saline solution added
then
.10x + .40(4) = .15(x+4)
.10x + 1.6 = .15x+0.6
1.6 = .05x+0.6
1 = .05x
1/.05 = x
20 liters = x

RELATED QUESTIONS
how many liters of a 10% saline solution must be added to 4 liters of a 40% saline... (answered by stanbon)

How many liters of a 10% saline solution must be added to 4 liters of a 40% saline... (answered by ikleyn)

How many liters(L) of a 10% saline solution must be added to a 40 L of a 20% saline... (answered by richwmiller)

How many liters of a 20% saline solution and how many of a 10% saline solution must be... (answered by fractalier)

How many liters of a 10% saline solution must be mixed with 20 liters of a 15% saline... (answered by josmiceli)

how many liters of a 3%saline solution must be added to an 8% saline solution to obtain... (answered by nerdybill)

How many liters of a 3% saline solution must be added to an 8% saline solution to obtain (answered by josgarithmetic)

How many liters of 3% saline solution must be added to an 8% saline solution to obtain 20 (answered by josgarithmetic)

how many liters of a 30% saline solution must be mixed with a 40% saline solution to... (answered by nerdybill)