The time taken by A to complete the work is 2/3rd of time taken by B to complete the same work and the time taken by C to complete the work is 5/6 of time taken by B.Difference between time taken by A and C is 6 days . If C worked for 10 days alone and B worked for 4 days  alone then A worked for x days the total work gets finished. Find the value of x.