Question

S - t = 3
S/3 + t/2 = 6
Do in simultaneous linear equation

Answer 1

taking LCM of equation 2,
(2S+3t)/6=6
2S+3t=36

Multiplying equation 1 with 3
3S-3t=9

Adding equation 1 & 2, we get,
3S-3t+2S+3t=36+9
5S=45
S=9
substituting value of S in equation 1, we get
(9)-t=3
9-3=t
t=6

hope this helps!  

Answer 2

Hope helps you............