Find the ordered pair (s,t) that satisfies the system
s/2 + 5t = 3
3t - 6s = 9 - 5t
s/2 = 3 - 5t mult through by 2 → s = 6 -10t
3t - 6(6 - 10t) = 9 - 5t
3t - 36 + 60t = 9 - 5t
63t + 5t = 9 + 36
68t = 45
t = 45 / 68
s = 6 - 10 (45/68) = -21 / 34
