SOLUTION: Beau Glaser wishes to strengthen a mixture from 10% alcohol to 30% alcohol. How much pure alcohol should be added to 7 L of the 10% mixture?
Algebra.Com
Question 258476: Beau Glaser wishes to strengthen a mixture from 10% alcohol to 30% alcohol. How much pure alcohol should be added to 7 L of the 10% mixture?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
.10*7+x=.30(7+x)
.7+x=2.1+.3x
x-.3x=2.1-.7
.7x=1.4
x=1.4/.7
x=2 liters of pure alcohol is needed.
Proof:
.10*7+2=.30(7+2)
.7+2=.3*9
2.7=2.7
RELATED QUESTIONS
Beau Glaser wishes to strengthen a mixture from 10% alcohol to 30% alcohol. How much pure (answered by Alan3354)
Beau wishes to strengthen a mixture from 10% alcohol to 30% alcohol.How much pure alcohol (answered by stanbon)
A chemist wishes to strengthen a mixture from 10% alcohol to 30% alcohol. How much pure... (answered by Earlsdon)
To strengthen a mixture of 10% alcohol to 30% alcohol, how much pur alcohol must be added (answered by Mathtut)
how much pure alcohol should be added to 7l of 10% alcohol to increase the concentration... (answered by josgarithmetic)
a pharmacist needs to strengthen 15% alcohol solution to one of 32% alcohol. How many... (answered by josgarithmetic)
How much water should be added to four liters of pure alcohol to make a mixture of 40%... (answered by lwsshak3)
A 50 gallon of mixture contains 20% alcohol and 80%orange juice,how much pure alcohol... (answered by josmiceli)
How many quarts of pure alcohol should be added to 10 quarts of 10% alcohol solution to... (answered by ikleyn,josgarithmetic,greenestamps)