SOLUTION: How many liters of a 40% antifreeze solution must be mixed with 5 liters of a 70% antifreeze solution to make a mixture that is 60% antifreeze?
I can't figure out how to set thi
Algebra.Com
Question 271287: How many liters of a 40% antifreeze solution must be mixed with 5 liters of a 70% antifreeze solution to make a mixture that is 60% antifreeze?
I can't figure out how to set this up.
Found 2 solutions by stanbon, CharlesG2:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
How many liters of a 40% antifreeze solution must be mixed with 5 liters of a 70% antifreeze solution to make a mixture that is 60% antifreeze?
-------------------------
Equation:
alcohol + alcohol = alcohol
0.40x + 0.70*5 = 0.60(x+5)
------
Multiply thru by 100
40x + 70*5 = 60x + 60*5
-20x = -10*5
x = 2.5 liters (amt. of 40% solution needed in the mixture)
=================
Cheers,
Stan H.
Answer by CharlesG2(834) (Show Source): You can put this solution on YOUR website!
How many liters of a 40% antifreeze solution must be mixed with 5 liters of a 70% antifreeze solution to make a mixture that is 60% antifreeze?
I can't figure out how to set this up.
mixture A + mixture B = mixture C
OR
% in A * A + % in B * B = % in C * C
40% * A + 70% * B = 60% * C
A = x, B = 5 liters, C = 5+x liters
0.40x + 0.70 * 5 = 0.60(5+x)
0.40x + 3.5 = 3 + 0.60x
0.5 = 0.20x
2.5 liters = x
RELATED QUESTIONS
How many liters of a 25% antifreeze solution must be mixed with 4 liters of a 60%... (answered by richwmiller)
how many liters of 20% antifreeze solution and a 40% antifreeze solution must be mixed... (answered by josgarithmetic,lwsshak3)
How many liters of a 25% antifreeze solution should be mixed with a 40% antifreeze... (answered by ikleyn)
how much pure water must be mixed
with 2 liters 40% solution of antifreeze to get a 25% (answered by richwmiller)
How many liters each of a 15% antifreeze solution and a 30% antifreeze solution must be... (answered by Maths68)
How many liters of a 30% antifreeze solution and 60% antifreeze solution must be mixed to (answered by ptaylor)
How many liters each of a 15% anrifreeze solution and a 30% antifreeze solution must be... (answered by wilft1)
How many liters each of a 40% antifreeze solution and a 80% antifreeze solution... (answered by VFBundy)
How many gallons of a 50% antifreeze solution must be mixed with 70 gallons of 10%... (answered by stanbon,Alan3354)