First I will give a description of how to actually do these kinds of problems.
Now let's see if we can apply it to an equation.
Above, I only gave a section of how to, if you would like to learn the rest of it, keep going.
Although they may not be phrased quite as clearly, word problems use linear equation set-ups quite frequently.
This is extra information that is not needed for the steps above. It will be helpful in the long run though.
Here is a link to a fun basketball game that includes slope-intercept formatting. There are a few other things in there, but I believe I showed how to do them at the bottom of my lesson.