SOLUTION: Christine drove 200 miles using 9 gallons of gas. At this rate, how many gallons of gas would she need to drive 420 miles?

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Question 892005: Christine drove 200 miles using 9 gallons of gas. At this rate, how many gallons of gas would she need to drive 420 miles?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
200/9=420/x
200x=3780
x=3780/200
x=18.9 gal