Steven asks…How many liters of 30% alcohol solution a,?Please help. How many liters of 30% alcohol solution a, is mixed with 70% alcohol solution b to produce 20 liter 40% alcohol solution?Nancy answers:Lets rename Solution A as (x) and Solution B as (20-x). You can find the value of (x) itself and then subtract that from the total of 20 liters to find Solution B which we renamed as (20-x)
so 30% of (x) plus 70% of (20-x) = 40% of 20 liters.
Turn % into decimal and rewrite:
.30(x) +
