SOLUTION: A family has two cars. The first car has a fuel efficiency of 20 miles per gallon of gas and the second has a fuel efficiency of 30 miles per gallon of gas. During one particular w

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Question 1150271: A family has two cars. The first car has a fuel efficiency of 20 miles per gallon of gas and the second has a fuel efficiency of 30 miles per gallon of gas. During one particular week, the two cars went a combined total of 1150 miles, for a total gas consumption of 50 gallons. How many gallons were consumed by each of the two cars that week?

Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
                          (gallons)    (miles)
              efficiency   volume      distance

firstcar        20         50-x       20(50-x)

secondcar       30          x          30x
   
TOTALS                      50         1150

Solve the equation, 20%2850-x%29%2B30x=1150.