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posted by Mikayla on Tuesday, February 7, 2012 at 8:35am.
a trip of 120 miles required 7 gallons of gas. at this rate how many gallons would be needed at 180?
let x = gallons needed 120 : 7 = 180 : x , or 120/7 = 180/x x/7 = 180/120 x = 7*3/2 x = 10.5 gallons
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