8/12 + 6/x = 1
X = 18 days
A can do a piece of work in 12 days. When he had worked for 2 days B joins him. If the complete work was finished in 8 days. In how many days B alone can finish the work?
[1] 28 days
[2] 76 days
[3] 16 days
[4] 18 days
[5] 19 days