How many gallons of a 70 antifreeze solution must be mixed with 90 allons of 15 antifreeze to get a mixture that is 60

Question

How many gallons of a 70 antifreeze solution must be mixed with 90 allons of 15 antifreeze to get a mixture that is 60 antifreeze Use ne six step method Strength Gallons of Solutions 70 15 60 X 90 x 90 Gallons Antifree

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