W walter001 New member Joined Sep 27, 2006 Messages 1 Sep 27, 2006 #1 i have 10 gallons at a 5% solution, i need to add x gallons at 20 % solution and end up with a solution of 6%. How do i set up this formula? thanks
i have 10 gallons at a 5% solution, i need to add x gallons at 20 % solution and end up with a solution of 6%. How do i set up this formula? thanks
G galactus Super Moderator Staff member Joined Sep 28, 2005 Messages 7,203 Sep 27, 2006 #2 You have a 5% mixture, so it's not going to take much of a 20% to bring it up to 6%. You have 10 gallon at 5% concentration: 0.05(10) You have x gallons at 20% concentration: 0.20x They must equal 6% concentration: 0.05(10)+0.20x=0.06(x+10) Solve for x.
You have a 5% mixture, so it's not going to take much of a 20% to bring it up to 6%. You have 10 gallon at 5% concentration: 0.05(10) You have x gallons at 20% concentration: 0.20x They must equal 6% concentration: 0.05(10)+0.20x=0.06(x+10) Solve for x.
D Denis Senior Member Joined Feb 17, 2004 Messages 1,700 Sep 28, 2006 #3 Code: a @ x b @ y ======== a+b @ z (ax + by) / (a + b) = z Tatoo that on your wrist :wink:
