Question

how many liters of 20% alcohol solution to be added to the 40 liters of 50% alcohol solution to make a 30% solution?

Answer 1

Step-by-step explanation:

x = liters of 20% alcohol

Given: 40 liters of 50% alcohol

x + 40 = liters of final mixture of 30% alcohol

Set this up as

0.20x + 0.50(40) = 0.30(x + 40)

Solve for x and finish from here.