SOLUTION: 45. Ryan can do a job in 12 days. After he has worked for 4 days, he is joined by Sandy. They finish the job together in 2 more days. How long will it take Sandy to do the whole jo

Algebra ->  Rate-of-work-word-problems -> SOLUTION: 45. Ryan can do a job in 12 days. After he has worked for 4 days, he is joined by Sandy. They finish the job together in 2 more days. How long will it take Sandy to do the whole jo      Log On


   



Question 927838: 45. Ryan can do a job in 12 days. After he has worked for 4 days, he is joined by Sandy. They finish the job together in 2 more days. How long will it take Sandy to do the whole job herself?
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
Ryan alone and Ryan and Sandy together perform a sum of the job portions equivalent to the whole job.

Let x be the time in days for Sandy to do one whole job alone.
highlight_green%28%281%2F12%29%2A4%2B%281%2F12%2B1%2Fx%29%2A2=1%29

Solve for x.