To find out how far the truck could drive with 7 gallons of gasoline, we need to determine the distance covered per gallon of gasoline.
The truck drives 120 miles with 5 gallons of gasoline.
So, the truck drives 120/5 = <<120/5=24>>24 miles per gallon of gasoline.
Therefore, with 7 gallons of gasoline, the truck could drive 24 x 7 = <<24*7=168>>168 miles. Answer: \boxed{168}.
A truck drives 120 miles and uses 5 gallons of gasoline. How far could the truck drive with 7 gallons of gasoline?
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