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?

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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) About Me  (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

s%2F%28s%2Bw%29=0.20 and s%2Bw=100
Two variables unknown and two equations. Solve the system. Note, you do not really need the second equation. You essentially have just this:

highlight%28s%2F100=0.20%29, 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.