Answer :
[tex]x-\ Chaya's\ working\ hours\\
x-3\ Jon's\ working\ hours\\
x+4\ Angel's\ working\ hours\\\\
x+x-3+x+4=196\\
3x+1=196\ \ \ |Subtract\ 1\\
3x=195\ \ \ |Divide\ by\ 3\\x=65\\\\Jon\ worked\ 62\ hours\, Chaya\ 65\ hous\ and\ Angel\ 69.[/tex]
J=62
A=69
C=65
This is the answer because you would divide the total (196) by 3 because there are 3 people and then you would get the answer for C. Then add 4 to get the answer for a. The you would subtract C from 3 to get the answer to J.