I need help on how to do system applications word problems. I just don't get this at all :(

1. The ravens won twice as many games as they lost. They played 96 games. How many games did they win?

2. State college has 620 students. There are 20 more women than men. How many women are there?

3 answers

x + 2x = 96
3x = 96
x = 32 games lost

x + x + 20 = 620
How would you know how to set it up?
The Ravens lost x games. They won twice as many games -- so it's x + 2x = 96