A family has two cars. The first car has a fuel efficiency of 30 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 1050 miles, for a total gas consumption of 50 gallons. How many gallons were consumed by each of the two cars that week?
+36915 x gal = 30 mpg #
50-x = 15 mpg #
30 x + 15 (50-x) = 1050 solve for 'x' the number of gallons at 30mpg. then the # 15 mpg gallons is 50 -x
