One month, jon worked 3 hours less than chaya, and amgelica worked 4 hours more than chaya. together they worked 196 hours. find the number of hours each person worked.

Okay lets look at the problem first
so Chaya is our X Value
and we know that the total is 196
lets divide the total by 3
so we have 65.1
lets forget the point one for now
know if each person worked 65 hours this would be over 
but we know that Jon Worked 3Hours less then Chaya that would put him at 62
Know we need to put that 3 hours to the side and remember we havnt used it yet
And we know that Amgelica worked 4 more hours then Chaya andwe still have 4 hours left over so that puts her at  69 hours
so Jon (a) worked 62 hours
Amgelica (b)worked 69 hours 
and Chaya (c)at 65
a+b+c=196
62+69+65=196
I hope this helped