Setup the equation like this:
You can then multiply both sides by 500 to get:
In fact, you can type the original equation into Google.com, and it will do the calculation for you.
40 gallons
At 20 miles per gallon, it would take 9 gallons to travel 180 miles.
12 miles / 3 gallons = 4 miles per gallon So for 1 gallon, the car can travel 4 miles.
16.25 miles/gallon 100 gallons x 16.25 miles = 1625 miles
You need 699/30 = 23.3 gallons.
41 gallons
40 gallons
How many gallons the van needs to travel 550 miles? A van travels 220 miles on 10 gallons of gas.
46.875 Gallons
At 20 miles per gallon, it would take 9 gallons to travel 180 miles.
12 miles / 3 gallons = 4 miles per gallon So for 1 gallon, the car can travel 4 miles.
16.25 miles/gallon 100 gallons x 16.25 miles = 1625 miles
1158/20 = 57.9 gallons
17.4
You need 699/30 = 23.3 gallons.
If you can travel 25 miles on one gallon. Then 1100 / 25 = 44 gallons of gas are needed to travel 1100 miles.
20 gallons of gas