SOLUTION: A tank contains 50 gallons of a 40% solution of antifreeze. How much solution needs to be drained out and replaced with pure antifreeze to obtain a 50% solution.
I really don't
Algebra.Com
Question 163917: A tank contains 50 gallons of a 40% solution of antifreeze. How much solution needs to be drained out and replaced with pure antifreeze to obtain a 50% solution.
I really don't know to do this. This is what I think.
100%=x 50 gallons=x 40% solution=X 50% solution=x
Let x= amount of pure antifreeze
x+0.4 (100)= .05(100+x)
x+4=50+0.5
x+4=.50(100)+0.4
I'm lost after this.
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A tank contains 50 gallons of a 40% solution of antifreeze. How much solution needs to be drained out and replaced with pure antifreeze to obtain a 50% solution.
:
Let x = amt of 40% solution removed, and amt of pure antifreeze added:
:
.4(50 - x) + x = .5(50)
:
Solve this and you should have it.
RELATED QUESTIONS
To Whomever can assist... Thank you!
A tank contains 50 gallons of a 40% solution of... (answered by funmath)
A 16-quart radiator contains a 50% solution of antifreeze. How much needs to be drained... (answered by Mathtut)
need help solving this problem please.
A tank contains 55 gallons of a 55% solution of... (answered by josmiceli)
A tank contains 50 gallons of a 40% solution of anti-freeze. How much solution needs to... (answered by Mathtut)
ok....Suppose that a 12 quart radiator contains a 20% solution of antifreeze. how much... (answered by nerdybill)
A 10-quart radiator contains a 40% antifreeze solution. How much of the solution needs to (answered by josmiceli,ikleyn)
An 18 quart radiator contains a 40% solution of antifreeze. How much must be drained out... (answered by checkley77)
A 6-quarts radiator contains a 20% antifreeze solution. How much of the solution needs to (answered by edjones)
A 8-quart radiator contains a 60% antifreeze solution. How much of the solution needs to... (answered by mananth)