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...

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 1400

miles, for a total gas consumption of 55

gallons. How many gallons were consumed by each of the two cars that week?