Problem page 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 20 miles per gallon of gas. during one particular week, the two cars went a combined total of 1100 miles, for a total gas consumption of 45 gallons. how many gallons were consumed by each of the two cars that week?
You will have 2 equations. 30x+20y=1100 and x+y=45 by putting it into standard form -(30/20)x+55=y you can now solve finding the answer to be 20 for x and 25 for y. Plug it into the original equation to find it correct and then plug it into x+y 20+25=45 30*20+25*20=1100
