At the pharmacy are in one container 20% solution in the second 50% solution of disinfectant. They need to prepare 4 L of 48-percent solution.

What amount of solution from each container is needed to mix?

Correct result:

x =  0.27 L
y =  3.73 L


x+y=4 0.2x+0.5y=0.484  y=4x 0.2x+0.5(4x)=0.484 x=0.50.480.34=0.27 L
y=4x=3.73 L

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