Question 34661
"A pharmacist needs 6 oz of a 30% codeine solution" Of refering to the product:
Let the solution be x
Equation:
20x+50(6-x)=30(6)
20x+300-50x=180
-30x=-120
x=4
6-4=2
Hence, he needs 4 oz of 20% and 2 oz of 50%.
Paul.