If you let x=the amount of pure salt, then you have:
Solve for x.
I'm not sure how to set up the equations for this type of problem. This is my guess at the equations, but it came out with a negative answer which didn't seem right.How many kilograms of pure salt must be added to 5 kg of a 20% salt solution in order to produce a 25% solution?
Code:s + 4w = .2 s + w = 5
Thanks for any help