SOLUTION: How many liters of a 15% solution must be mixed with 20 liters of a 45 % solution to obtain a 25% solution?? My instructor shows us a box of 9 squares to solve this problem. It do
Algebra.Com
Question 905467: How many liters of a 15% solution must be mixed with 20 liters of a 45 % solution to obtain a 25% solution?? My instructor shows us a box of 9 squares to solve this problem. It does not make sense to me, is there another easier way??
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
I enjoy doing those type problems but please post one at a time.
0.15*x+0.45*20=0.25(20+x)
0.15*x+9=5+0.25x
0.15x-0.25x=5-9
-0.1x=-4
x=40 gal of 15% is added to 20 gal of 45% to get 60 gal at 25%
check
0.15*40+0.45*20=0.25(20+40)
6+9=0.25(60)
15=15
ok
RELATED QUESTIONS
How many liters of 15% alcohol solution must be mixed with 25 liters of a 20% alcohol... (answered by josgarithmetic)
how many liters of 25% alcohol solution and 15% alcohol solution must be mixed to obtain... (answered by Alan3354)
How many liters of a 12% salt solution must be mixed with 15 liters of a 44% salt... (answered by ikleyn)
How many liters of a 15% sugar solution must be mixed with 5 liters of a 45% sugar... (answered by josgarithmetic)
How many liters of a 15% acid solution must be mixed with 5 liters of a 25% acid solution (answered by stanbon)
How many liters of a 15% salt solution must be mixed with 5 liters of a 25% salt solution (answered by Alan3354)
"How many liters of a 40% alcohol solution must be mixed with a 65% solution to obtain 20 (answered by stanbon)
Solution A is 25% acid and Solution B is 10% acid. How many liters of each must be mixed... (answered by Alan3354)
How many liters of a 20% acid solution must be mixed with 15 liters of a 60% solution to... (answered by math_helper)