Explain the meaning of 0 on the running back loses 7 yards on his carry

Use set buikder notation to represent the following set: {, -2, -1, 0}

If myesha works overtime, she gets paid "time and a half" for every hour she works. in other words, for every hour over 40 hours myesha works each week, she gets her hourly pay plus half her hourly pay. what is myesha's pay per hour when she works overtime?

What does x = in this equation x+3+2x=x+5