Anurse mixes 80 cc of a 45% saline solution with a 10% saline solution to produce a 20% saline solution. How much of the 10% solution should he use?

Answer 1

80(45) + x(10) = (80+x)(20)

3600 + 10x = 1600 + 20x

10x = 2000

x = 200 cc of 10% solution