A family has two cars. The first car has a fuel efficiency of 35 miles per gallon of gas and the second has a fuel efficiency
of 15 miles per gallon of gas. During one particular week, the two cars went a combined total of 1325 miles, for a total
gas consumption of 55 gallons. How many gallons were consumed by each of the two cars that week?

 Mar 12, 2020

35 x   +   15 (55-x)   = 1325       solve fo x, the gallons used by the 35 mpg car.... then the other is   55-x

 Mar 13, 2020

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