Problema Solution

10 kg of sea water has 4% salt.

How much unsalted water should i give to the 10 kg of water to get 3% of salt?

Answer provided by our tutors

Let 'x' represent the kilograms of unsalted water (water that has 0% salt).

0.04*10 + 0*x = 0.03(10 + x)

........

click here to see the equation solved for x

........

x = 3.33 kg

3.33 kg of unsalted water should be added to the 4% water.