SOLUTION: Suppose that you have a supply of a 30% solution of alcohol and a 70% solution of alcohol. How many quarts of each should be mixed to produce 20 quarts that is 40% alcohol?

Question 883015: Suppose that you have a supply of a 30% solution of alcohol and a 70% solution of alcohol. How many quarts of each should be mixed to produce 20 quarts that is 40% alcohol?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Suppose that you have a supply of a 30% solution of alcohol and a 70% solution of alcohol. How many quarts of each should be mixed to produce 20 quarts that is 40% alcohol?
-------
Equation:
alch + alch = alch
0.30x + 0.70(20-x) = 0.40*20
---------------------------------
30x + 70*20 - 70x = 40*20
-40x = -30*20
x = 15 quarts (amt. of 30% solution needed)
20-x = 5 quarts (oamt. of 70% solution needed)
---------------------------
Cheers,
Stan H.
------------
RELATED QUESTIONS
Suppose that you have a supply of a 30% solution of alcohol and a 70% solution of... (answered by Alan3354)

Suppose that you have a supply of 30% solution of alcohol and a 70% solution of alcohol.... (answered by ewatrrr)

Suppose that a pharmacist has a supply of a 30% solution of alcohol and a 70% solution of (answered by mananth)

suppose you havea supply of a 30% solution of alcohol and a 70% solution of alcohol. How... (answered by ewatrrr)

Suppose that you have a supply of a 25% solution of alcohol and a 75% solution of... (answered by stanbon)

Suppose you have a supply of a 25% solution of alcohol and a 75% solution Of alcohol. How (answered by josmiceli)

suppose that you have a supply of a 20% solution of alcohol and a 70% solution of... (answered by josgarithmetic)

Suppose that you have a supply of a 20% solution of alcohol and a 80% solution of... (answered by edjones)

Suppose that you have a supply of a 10% solution of alcohol and a 90% solution of... (answered by stanbon)