SOLUTION: It is necessary to have a 40% antifreeze solution in the radiator of a certain car. The radiator now has 50 liters of 20% solution. How many liters of this should be drained and re

Question 818689: It is necessary to have a 40% antifreeze solution in the radiator of a certain car. The radiator now has 50 liters of 20% solution. How many liters of this should be drained and replaced with 100% antifreeze to get the desired strength?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
(50 - v)(0.20) + v(1.00) = 50(0.40)
50(0.20) - v(0.20) + v(1.00) = 20
10 + v(0.80) = 20
v(0.80) = 10
v = 12.5
---
answer:
drain 12.5 liters from the radiator, then add 12.5 liters of 100% antifreeze
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Convert fractions, decimals, and percents:
https://sooeet.com/math/fraction-decimal-percent.php
---
Calculate and graph the linear regression of any data set:
https://sooeet.com/math/linear-regression.php
RELATED QUESTIONS
It is necessary to have a 40% antifreeze solution in the radiator of a certain car. The... (answered by checkley77)

It is necessary to have a 40% solution in the radiator of a certain car. The radiator... (answered by nerdybill)

It is necessary to have a 40% antifreeze solution in the radiator of a certain car. The... (answered by josmiceli)

It is necessary to have a 40% antifreeze solution in the radiator of a certain car. The... (answered by stanbon)

Is it necessary to have a 40% antifreeze solution in the radiator of a certain car. The... (answered by josgarithmetic)

it is necessary to have a 40% antifreeze solution in the radiator of a certain car. The... (answered by mananth)

It is necessary to have a 40% antifreeze solution in the radiator of a certain car. The... (answered by josgarithmetic)

It is necessary to have a 40% antifreeze solution in the radiator of a certain... (answered by josgarithmetic,ikleyn,greenestamps)

I'm really stuck on this word problem.word problem are my weakness: It is necessary to... (answered by ankor@dixie-net.com,solver91311)