SOLUTION: Applying Systems: Question: Jenny mixes a 30% saline solution ith a 50% saline solution to make 800 milliliters of a 45% saline solution. How many milliliters of each solution do

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Question 254729: Applying Systems:
Question:
Jenny mixes a 30% saline solution ith a 50% saline solution to make 800 milliliters of a 45% saline solution. How many milliliters of each solution does she use? (use elimination or subsitituon)
Please,Thank You.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
x+y=800
.30x+.5(y)=.45*800
using substitution
.30x+.5(800-x)=.45*800