X men can do a work in 120 days. If there were 20 men less, the work would have taken 60 days more. What is the value of X?	Choices
A) 60  B) 77  C) 26  D) 66  E) 281
We have M1 D1 = M2 D2   120X = (X - 20)180   =&gt; 2X = (X - 20) 3 =&gt; 2X = 3X - 60   =&gt; X = 60   60nswer:60
<result>A</result>
X men can do a work in 120 days. If there were 20 men less, the work would have taken 60 days more. What is the value of X?