Question

A group of workers could cut a field in 20 days. 9more workers were added and work finished 4 days ealry. how manuy workers were there initially

Answer 1

x no. of workers -20days
x+9 " " " " -16 days
16x=20(x+9)
16x=20x+180
4x=180(negative deducted)
x=45