Problema Solution
a chemist needs 12 liters of a 40% alcohol solution. She must mix a 20% solution and a 50% solution. How many liters of each will be required to obtain what she needs?
Answer provided by our tutors
let
x = liters of the 20% solution
y = liters of the 50% solution
a chemist needs 12 liters of a 40% alcohol solution
x + y = 12
0.20x + 0.50y = 0.40*12
by solving the system of equations we find
x = 4 liters
y = 8 liters
click here to see the step by step solution of the system of equations
the mix requires 4 liters of the 20% solution and 8 liters of the 50% solution.