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OussaMah · Answer 1 · 2019-03-01T09:20:54+0000

Your end result has to come out with the unit "gallons."

Write and solve an equation of ratios, as follows:

180 miles 420 mi
-------------- = ------------
12 gal x

Then 180x = 5040, or x = 20

The car would need 20 gallons of gas to travel 420 miles.

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