Problema Solution
How many quarts of pure antifreeze must be added to 5 quarts of 10% antifreeze solution to obtain a 60% antifreeze solution?
Answer provided by our tutors
let
x = qt of pure 100% antifreeze
1.00*x + 0.10*5 = 0.60(x + 5)
by solving we find
x = 6.25 qt
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6.25 quarts of pure antifreeze must be added.