Question 205939: Confusing. Help Pls.
How much water must be added to 30 liters of a 75% salt solution to reduce it to 15%? Found 2 solutions by nerdybill, ankor@dixie-net.com:Answer by nerdybill(7384) (Show Source):
You can put this solution on YOUR website! How much water must be added to 30 liters of a 75% salt solution to reduce it to 15%?
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Let x = liters of water added
then
.75(30) = .15(30+x)
22.5 = 4.5 + .15x
18 = .15x
120 liters = x
You can put this solution on YOUR website! How much water must be added to 30 liters of a 75% salt solution to reduce it to 15%?
:
Let x = amt of water required to this
:
the amt salt remains the same, only the % salt changes
A simple equation
:
.75(30) = .15(x + 30)
:
22.5 = .15x + 4.5
:
22.5 - 4.5 = .15x
:
18 = .15x
x =
x = 120 liters of water required
:
:
Check solution original equation (equal amt of salt)
.75(30) = .15(120 + 30)
22.5 = .15(150)
22.5 = 22.5
;
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Did this unconfuse you somewhat
