SOLUTION: I believe this is a mixture problem, but I am stuck at setting it up (formula). Can you please help me! Here is the question: How many ounces of pure water must be added to 60 oz

Question 5363: I believe this is a mixture problem, but I am stuck at setting it up (formula). Can you please help me! Here is the question: How many ounces of pure water must be added to 60 oz of a solution that is 20% water to make a solution that is 30% water? I know this is not set up right.
Amount . rate = Quantity
Pure H20 x .30 .20x
60 oz. .20
Found 2 solutions by rapaljer, melzaren:
Answer by rapaljer(4671) (Show Source): You can put this solution on YOUR website!
Let x = amount of pure water at 100% water
60 = solution being mixed at 20% water
x+60 = resulting mixture at 30% water.

From this, the equation is:
1.00(x) + (.20)(60) = (.30)(x+ 60)
1.00x + 1.20 = .30x + 1.80

Appropriate simplification gives you
.70x = .60
oz.

It usually comes out more even than this, but sometimes life is like that. I think it's right. Anybody see an error?

R^2 at SCC

Answer by melzaren(3) (Show Source): You can put this solution on YOUR website!
x * 1.0 + 60 * .20 = .30* (x+60)
1.0x + (60 * .20) = .30*(x + 60)
x + 12 = .30x + 18
x - .30x = 6
.70x = 6

x = 6/ .7
x = 60/ 7
RELATED QUESTIONS
Ok so I have homework and my teacher didn't help me much to understand it. I have tried... (answered by jim_thompson5910,josgarithmetic)
I am stuck on this problem. I believe it is a Z formula, but cannot find the formula to... (answered by ewatrrr)
I am attempting to solve an applied problem and having trouble setting it up. Train A is (answered by stanbon)
I have a question from a study book for taking firefighting exams. The formula makes... (answered by Nate)
Can you please help me solve this problem?!!? {{{9x^4=25x^2-16}}} The directions say:... (answered by Alan3354,jim_thompson5910,stanbon)
PLEASE HELP!!! I have tried a lot of different ways to set this problem up. I am stuck... (answered by sudhanshu_kmr)
Problem 24: 3 sqrt -8/27 I believe this is not a real number, is this correct? If... (answered by stanbon,checkley71)
Hello, I am stuck on a problem for homework and need some help. I worked it out but am... (answered by Alan3354)
this problem says use synthetic division to divide (3x^3 - 7x^2 - 22x + 8) by (x-4) I... (answered by stanbon)