how many liters each of the 30% solution and water should he mix to make the desired 18 liters of 10% solution

Question

a chemist needs 18 liters of a 10% alcohol solution but has only a 30% alcohol solution. how many liters each of the 30% solution and water should he mix to make the desired 18 liters of 10% solution

Answer 1

“A chemist needs 18 liters of a 10% alcohol solution but has only a 30% alcohol solution. How many liters each of the 30% solution and water should he mix to make the desired 18 liters of 10% solution?”

x = liters of 30% in mix
y = liters of water in mix

0.3x + 0y = 0.1*18
x + y = 18

Solve this system of linear equations, Haley, and check your answers.