Question 189290
Let x = no of days to complete the job
   1/x = amount of work done in 1 day

{{{(1/4)+(1/6)+(1/2)=(1/x)}}}

Multiply both sides by 12

{{{3+2+6=12/x}}}

Multiply both sides by x

{{{11x=12}}}

Divide both sides by 11

{{{x=12/11}}}

It would take 1 1/11 days to complete the job.