SOLUTION: how many gallons of 50% antifreeze solution must be mixed with 90 gallons of 20% antifreeze to get a mixture that is 40% antifreeze?

SOLUTION: how many gallons of 50% antifreeze solution must be mixed with 90 gallons of 20% antifreeze to get a mixture that is 40% antifreeze?

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Question 876693: how many gallons of 50% antifreeze solution must be mixed with 90 gallons of 20% antifreeze to get a mixture that is 40% antifreeze?
Answer by josgarithmetic(39621) (Show Source): You can put this solution on YOUR website!
Learn to understand this kind of mixture problem in this lesson:
Mixture: one material quantity unknown

Let v = how many gallons of 50% to add.

Solve for v.
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