SOLUTION: How many quarts of pure antifreeze must be added to 5 quarts of a 10​% antifreeze solution to obtain a 20​% antifreeze​ solution?
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Question 1092629: How many quarts of pure antifreeze must be added to 5 quarts of a 10% antifreeze solution to obtain a 20% antifreeze solution?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
How many quarts of pure antifreeze must be added to 5 quarts of a 10% antifreeze solution to obtain a 20% antifreeze solution?
:
let x = amt of pure antifreeze required
:
The equation using decimal equiv of percent
.10(5) + x = .20(x+5)
.50 + x = .20x + 1
x - .20x = 1 - .5
.8x = .5
x - .5/.8
x = .625 qts of pure antifreeze required
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