SOLUTION: On a trip, Dave drives 267 miles, adds 8 gallons of gas to his tank, and drives another 310 miles before running out of gas. If Dave's car averages 18.2 miles per gallon, how many

Question 66305: On a trip, Dave drives 267 miles, adds 8 gallons of gas to his tank, and drives another 310 miles before running out of gas. If Dave's car averages 18.2 miles per gallon, how many gallons did Dave already have in his tank before starting this trip?
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
(8+x)18.2=267+310
145.6+18.2x=577
18.2x=577-145.6
18.2x=431.4
x=431.4/18.2
x=23.703296 gallons of gas in the tank before starting the trip.
proof
(8+23.703296)18.2=577
31.703296*18.2=577
577=577

RELATED QUESTIONS
Any help on this would be GREAT... On a trip, Dave drives 267 miles, adds 8 gallons of (answered by 303795)

AMY DRIVES 330 MILES USIN 15 GALLONS OF GAS. HOW MANY GALLONS OF GAS SHOULD SHE EXPECT TO (answered by nerdybill)

Jake has a Car with an 8-Gallon fuel tank. Jake fills his tank with gas and then drives... (answered by ankor@dixie-net.com)

Starting with a full tank of gas, if you use 9 gallons of gasoline, your car can go... (answered by josmiceli,josgarithmetic)

David drives 168 miles a week for work. He fills his gas tank twice a week. Each fill up... (answered by josgarithmetic)

Before starting out on a road trip you fill the gas tank with 12 gallons of gas. After... (answered by ewatrrr)

A car drives 630 miles on 35 gallons of gas. How far can it drive on 12... (answered by ewatrrr)

Rob drives his car at the same speed and uses 22 gallons of gas. How many miles has he... (answered by Alan3354)

Mr.Thoma's car can travel 17.6 miles per gallon of gas. If his gas tank holds 11 gallons, (answered by richwmiller)