Problema Solution
A hospital laboratory needs a 10% dextrose solution. However, only 5% and 20% dextrose concentrations are in stock. How much of the 20% concentration should be mixed with 100 fl oz of the 5% concentration to get a 10% solution?
Answer provided by our tutors
20 * x + 100 * 5 = ( x + 100) * 10
20x + 500 = 10x + 1000
10x = 500
x = 50 fl oz