Let's say the number of men working at the company is x.
Since there are 180 people, and the number of men is 20 fewer than the number of women, then x+x+20 = 180
The total number of employees in the company is 2x+20 = 180
2x=180-20
2x=160
The number of men is x=160/2
There are x=80 men in the company.
#### 80