Question 878918
Uniform Rate, work or task completion, RT=J  rate time job.


A,  1/9 jobs per day;
B,  1/15 jobs per day.
If A and B work at the same time, rate is {{{(1/9+1/15)}}} jobs per day.

If working together and then A leaves, then remaining time is worked by B.


A and B work together for x days, and then B continues to work alone for y days.
{{{highlight((1/9+1/15)x+(1/15)y=1)}}} AND {{{highlight(x+y=10)}}}.
The arithmetic and number property solving steps are undone so you can do them.