SOLUTION: how many gallons of a 90% antifreeze solution must be mixed with 90 gallons of 15% antifreeze to get a mixture that is 80% antifreeze?

SOLUTION: how many gallons of a 90% antifreeze solution must be mixed with 90 gallons of 15% antifreeze to get a mixture that is 80% antifreeze?

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Question 1108119: how many gallons of a 90% antifreeze solution must be mixed with 90 gallons of 15% antifreeze to get a mixture that is 80% antifreeze?
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
x, how much of the 90% antifreeze to add

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