Question 867516
1/j+1/t=1/3.5,
1/t+1/s=1/4,
1/t+1/j+1/s=1/3

1/t+1/j+1/s=1/3
1/t    +1/s=1/4,
1/j=4/12-3/12
1/j=1/12
j=12

1/t+1/j+1/s=1/3
1/t+1/j=1/3.5
1/s=1/3 -1/3.5
1/s=3.5/10.5-3/10.5
1/s=1/21
s=21


1/t+1/s=1/4,
1/t+1/21=1/4
1/t=21/84-4/84=17/84
t=84/17

j = 12,   s = 21,   t = 84/17
j=12.,   s=21.,   t=4.94118