SOLUTION: I Need help solving problem!! Automotive Maintenance. "Arctic Antifreeze" is 18% alcohol and "Frost No-More" is 10% alcohol. How many liters of Arctic Antifreeze should be mixe

Algebra ->  Linear-equations -> SOLUTION: I Need help solving problem!! Automotive Maintenance. "Arctic Antifreeze" is 18% alcohol and "Frost No-More" is 10% alcohol. How many liters of Arctic Antifreeze should be mixe      Log On


   



Question 376039: I Need help solving problem!!
Automotive Maintenance. "Arctic Antifreeze" is 18% alcohol and "Frost No-More" is 10% alcohol. How many liters of Arctic Antifreeze should be mixed with 7.5 L of Frost No-More in order to get a mixture that is 15% alcohol?

Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
Automotive Maintenance. "Arctic Antifreeze" is 18% alcohol and "Frost No-More" is 10% alcohol. How many liters of Arctic Antifreeze should be mixed with 7.5 L of Frost No-More in order to get a mixture that is 15% alcohol?
..
"Arctic Antifreeze" is 18% alcohol ------- x liters
"Frost No-More" is 10% alcohol. --------- 7.5 liters
a mixture 15% ---------------------------x+7.5 liters
..
18*x+10*7.5 = 15(x+7.5)
18x+75 = 15x+112.5
18x-15x=112.5-75
3x=37.5
/3
x=12.5 liters of Arctic Antifreeze
...
m.ananth@hotmail.ca