SOLUTION: Bob and Doug are filling up a 1140 gallon water container with buckets. Together, it took them 300 trips to fill the container. If Bob can carry 5 gallons per trip and Doug can car

Question 890830: Bob and Doug are filling up a 1140 gallon water container with buckets. Together, it took them 300 trips to fill the container. If Bob can carry 5 gallons per trip and Doug can carry 3 gallons per trip, how many trips does each one make?

Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
x how many trips Bob makes
y how many trips Doug makes

Account for trips: x+y=300.

Account for water volume: 5x+3y=1140.

Two equations in two unknowns, solve any way you want. Suggestion is multiply the trip account equation by 3, and use elimination to start with.
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