SOLUTION: how many gallons of water must be added to 20 gallons of 15% salt solution if the resulting solution is to only contain 11% salt

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Question 383908: how many gallons of water must be added to 20 gallons of 15% salt solution if the resulting solution is to only contain 11% salt
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
how many gallons of water must be added to 20 gallons of 15% salt solution
if the resulting solution is to only contain 11% salt
:
Let x = amt of water required
.15(20) = .11(x+20)
3 = .11x + 2.2
3 - 2.2 = .11x
.8 = .11x
x = .8%2F.11
x = 7.273 gal
:
:
See if that is true, the amt of salt should be the same
.15(20) = .11(27.273)
3 ~ 3.00