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Answer the following chemistry problem. Report the volume to the nearest gallon of hydrochloric acid.

How many gallons of 20% hydrochloric acid must be mixed with how many gallons of 80% hydrochloric acid to make 670 gallons of a 55% hydrochloric acid solution?

The number of gallons of 20% hydrochloric acid needed is gallons.

The number of gallons of 80% hydrochloric acid needed is gallons.