Begin your post with a statement of the problem so that we can understand what you are doing and demonstrate your problem. The goal should be to explain this problem so well that a classmate who "just doesn't get it" will be able to understand it completely!

1. Ray has found that his new car gets 31 miles per gallon on the highway and 26 miles per gallon in the city. He recently drove 285 miles on 10 gallons of gasoline. How many miles did he drive on the highway? How many miles did he drive in the city?

starting with the 2 equations:

x + y = 10

31x + 26y = 285