SOLUTION: A 90% antifreeze solution is to be mixed with a 75% antifreeze solution to make a 78% antifreeze solution. How many gallons of each solution must be mixed to ¯nish with 120 gallo

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A 90% antifreeze solution is to be mixed with a 75% antifreeze solution to make a 78% antifreeze solution. How many gallons of each solution must be mixed to ¯nish with 120 gallo      Log On


   

Question 365254: A 90% antifreeze solution is to be mixed with a 75% antifreeze solution
to make a 78% antifreeze solution. How many gallons of each solution
must be mixed to ¯nish with 120 gallons of the 78% solution?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
(90%)(x) + (75%)(120 - x) = (78%)(120)