SOLUTION: how many gallons of a 60% antifreeze solution must be mixed with 60 gallons of 20% antifreeze to get a mixture that is 50% antifreeze? use the 6 step method

Question 1030023: how many gallons of a 60% antifreeze solution must be mixed with 60 gallons of 20% antifreeze to get a mixture that is 50% antifreeze? use the 6 step method
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
I don't know the 6 step method, but
this is how I do it:
Let = gallons of 60% antifreeze solution needed
= gallons of pure antifreeze in the 60% solution
gallons of pure antifreeze in 20% solution
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180 gallons of 60% solution are needed
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check answer:

OK
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