SOLUTION: How would you make 100g of a saltwater solution that is 20% salt and also how many grams of salt and water would you need?

Question 751344: How would you make 100g of a saltwater solution that is 20% salt and also how many grams of salt and water would you need?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
All as weight per weight.

w = amount of water in grams
s = amount of salt in grams

and
Two variables unknown and two equations. Solve the system. Note, you do not really need the second equation. You essentially have just this:

, and the rest of the mass to make up to 100 grams would be the needed water. You may still use the second equation, mass balance.
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